FRIDAY, MAY, 8th ,2015 - fim.usv.ro · The results show that vibration analysis is a promising tool...

THE 18th INTERNATIONAL SCIENTIFIC CONFERENCE „TEHNOMUS”, May 8-9, 2015

„Ştefan cel Mare” University of Suceava - ROMANIA

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CONFERENCE PROGRAM

FRIDAY, MAY, 8th ,2015

0830 – 0930 GUESTS' ARRIVAL Observatorul Astronomic

0930 – 1200 PLENARY OPENING SESSION Amfiteatrul Observatorului Astronomic

KEYNOTE SPEAKERS

Agnès FABRE, École Nationale Supérieure des Arts et Métiers, ParisTEch, France

MICROGEOMETRY ON SURFACE TREATED PART: MEASUREMENT AND

INFLUENCE

Jos Vander SLOTEN, Katholieke Universiteit Leuven, Belgium

PATIENT-SPECIFIC BIOMEDICAL ENGINEERING FOR IMPROVED JOINT

RECONSTRUCTIONS

Michel MASSENZIO, Institut Universitaire de technologie Lyon1 – Université Claude

Bernard Lyon 1, France

UNCERTAINTY AND SENSITIVITY ANALYSIS, RELIABILITY ENGINEERING

DEDICATED TO VEHICLE RESTRAINT SYSTEMS

Lucian P. GEORGESCU, ”Dunărea de Jos” University of Galați

WATER AND SUSTAINABLE DEVELOPMENT IN LOWER DANUBE REGION

1200 – 1330 LUNCH

1330 – 1530 PARALLEL SESSIONS – SECTIONS. STAGE 1

SECTION 1. MANUFACTURING TECHNOLOGIES. ROOM: B 214, STAGE 1

TOPICS: Manufacturing Technologies; Cold Forming Technologies; Welding Technologies; Nonconventional

Technologies; Manufacturing Systems; Mechatronics, Robotics and Flexible Manufacturing; Computer-Aided Design,

Computer Aided Manufacturing

Session chairs:

Dumitru AMARANDEI

Valerie WOLFF

Laurenţiu SLĂTINEANU

1.STRUCTURAL HEALTH MONITORING APPLIED ON ORTHOPAEDIC IMPLANTS L.C. PASTRAV, S. LEURIDAN, J. ROOSEN, Q. GOOSSENS, M. MULIER, W. DESMET, K. DENIS, J.

Vander SLOTEN

Abstract: Based on the structural health monitoring paradigm, a series of research studies conducted at the Catholic

University of Leuven, Belgium analysed the stability of orthopaedic implants. Vibrational methods were applied on hip,

knee and shoulder implants in various fixation conditions. The results show that vibration analysis is a promising tool

able to help surgeons in assessing the stability of bone-implant structures.



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2.APPLYING SOME RULES VALID FOR AXIOMATIC DESIGN AND IDEAS DIAGRAM

IN CASE OF A DEVICE FOR ABRASIVE FLAP FINISHING OF SPIRAL GROOVES Laurenţiu SLĂTINEANU, Oana DODUN, Gheorghe NAGÎŢ, Margareta COTEAŢĂ, Irina BEŞLIU

Abstract: In order to decrease the roughness of functional surfaces, various manufacturing methods could be used. A

group of such machining methods is based on the use of abrasive particles as machining tools. If one takes into

consideration the f finishing of the external spiral grooves, one can find that only fewer machining methods could be

applied. One of these finishing methods is based on the use of abrasive flap wheels. Because usually there are not

specialized machine-tools for abrasive flap finishing, devices adaptable on universal machine tools could be necessary.

An efficient design method discussed and applied in the last decades is the so-called axiomatic design. Essentially, the

axiomatic design involves the use of two axioms, namely the independence axiom and the information axiom. There is a

stage in applying axiomatic design when the customer needs and the functional requirements must be established. On

the other hand, the so-called ideas diagram method is based essentially on finding versions for the distinct components

of the system to be designed. In a subsequently stage, the combinations of these versions are analyzed, in order to

detach the most convenient version of the future system. One took into consideration establishing the functional

requirements and design parameters specific to the axiomatic design method by means of ideas diagram method.

3.FROM MECHANICAL AUTOMATIC SYSTEMS TO HUMANOID ROBOTS - KEY

MILESTONES Ionel STAREȚU

Abstract: Human intention of creating an artificial structure similar to him is one of the oldest, which remained a

constant concern, being paid a high level of attention, and creative scholars throughout history have been going

through a maximum period of interest. This article presents the main stages of evolution of the legendary mechanical

machines or humanoid robots made real until now. The article is important because obviously during the next period

such concerns are widespread. They can be brought to the attention of researchers, engineers robotics and

mechatronics experts, in both academic environment and in manufacturing of potential mechatronic items in Romania,

the market for such products, as can be deduced from the existing data, having very encouraging potential in the near

future.

4.FLEXIBLE PARTS MEASUREMENT SIMULATION WITH A CAD MODEL

OBTAINED BY A REVERSE ENGINEERING METHOD Valéry WOLFF, Tran Dinh TIN, Stéphane RAYNAUD

Abstract: In the industry automotive and aerospace, there are a lot of flexible parts. There are two often used methods

to control these parts: the first method with metrology assembly gage and sensors, and the second method using a

coordinate measuring machine (CMM) to validate the parts positioned on the control device. This article introduces a

new method to take into account the real shape of the real parts before the positioning on the control device. The used

method is based on reverse engineering principles to rebuild the model CAD with its defaults. We use a Faro Arm to

scan the part and to obtain the cloud of points before rebuilding a CAD model. We apply the finite element method

(Abaqus, 3DCS) to calculate the geometry of a flexible part after positioning on the control device. The obtained

geometry is controlled with a virtual measurement method (Metrolog). This new approach use a CAD model linked to

the real shape of the part as an alternative to a CAD theoretical model.

5.SEQUENCE INFLUENCE OF STRETCHING AND MOMENT APPLIEDS AT BENDING

WITH STRETCHING CONCERNING PRECISION OF PIECES PRODUCED BY COLD

PLASTIC DEFORMATION Lucian V. SEVERIN, Traian Lucian SEVERIN

Abstract: This paper presents a theoretical resolution of sequence influence the application of tension and bending

moment concerning elastic recovery characteristics of pieces produced by cold plastic deformation. It was obtained

calculus relations the bending moment plastic and elastic recovery characteristic quantities that influence the

processing accuracy. Results obtained recommended bend workpieces by bending with stretching process until to the

yield strength of the material at stretching. Sequence application tension in relation to bendingmoment is not significant

on precision processed parts, but it is advisable to apply stretching moment before to reduce the no uniformities

deformation between due to friction between the workpiece and tool deformation.



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6.STRESS AND DEFORMATION STATES FOR STRAIGHT EDGE AND CURVED EDGE

HELICAL DRILLS Nicușor BAROIU, Dan Catalin BÎRSAN

Abstract: The literature shows that HSS helical drills must be studied from several points of view: their geometric

modelling, physics research of cutting formation process, durability of cutting tool, force and torsion moments sizes,

thermal phenomena in the drilling process, modelling through FEM analysis, or similar, of deformation processes for

cutting tools etc. In this paper, we comparatively present through a FEM analysis, the total deformation and action

when losing elastic stability for two types of helical drills: the drill with two straight edge blades and the drill with three

curved cutting edges.

7.MATHEMATICAL MODELING OF DYNAMIC PROCESSES OF CONTROL SYSTEM

OF HYDRAULIC DRIVE OF BELT CONVEYOR WITH VARIABLE LOAD Leonid POLISHCHUK, Oleh KOVAL

Abstract: For built-in hydraulic drive of belt conveyor which is equipped with two hydraulic motors mounted in

parallel a control system is proposed in order to activate the second hydraulic motor when the load exceeds the rated

load by a given value. The control system duty cycle diagram and computational scheme are developed, differential

equations are composed, which describe a movements of its movable masses as well as fluid balance equations for

phases of forward and backward strokes of shut-off-and -regulating element and unambiguity condition.

8.STUDIES REGARDING THE DOOR CAISSONS DEFECTS IN THE FORMING

PROCESS Margareta Iuliana FULGER (IORDACHE), Miron ZAPCIU, Eugen STRĂJESCU

Abstract: The purpose of this article is to present the results of a study regarding the defects appeared in door caissons

forming process. The study realized is a result of parts experiments based on 3D measurement laboratory. There were

used 3D instruments. Finding out and avoiding the defects is very important in the forming process. The research must

be extended for other door caissons for different types of cars. The studies presented offers useful information in

avoiding defects of door caissons of the cars and obtaining high quality automobile parts.

9.THE SRINGBACK ANALYSE AT V-BENDING OPERATION. THE UNIFORMISATION

AND DIMINUATION OF SPRINGBACK PHENOMEN

Ștefan MIHALACHE, Gheorghe NAGÎȚ, Dan CHIORESCU

Abstract: This article deals an important aspect of instability phenomen at sheet metal bending operation, namely the

springback (which is an geometric phenomen that affects accuracy byc hanging the geometric shape). In this paper it

was realise a theoretically and experimental study which highlights how these factors influence the springback at the

sheet V bending. A new influence factor was introduced – the temperature. It is analized how a few factors (thickness

material, bending force, punch radius and temperature) influencing the springback phenomen at V bending operation.

Using FEM, the authors try an interpretation at springback phenomen on Vbending operation of the influences factors

(bending force, thickness, punch radius and material).To highlight how the deformations evolute during the bending

process it is made a simulation with a finite element using the ANSIS programme. The authors observed the tension

dispertion equivalent stress, equivalent plastic strain, bending forces and places wich the springback effect is higher.

The springback phenomen can be diminuated? The temperature is the answer? They observed too the sheet

comportement during bending operation. The experimental research regarding springback phenomen is made on CNC

bending machine (DURMA AD-R 37175) withthree bending punches (at different punch radius: 0.8 mm, 2.0 mm and

5.0 mm). The material analised are aluminum and brass at two different thicknes:0.5, 1.0 mm (for almoust all

inflnenced factors), 0.5, 1.0, 1.5 mm (at aluminum material studying the influence of temperature factor), 0.30.5, 1.5

mm (at brass material studying the influence of temperature factor) In bending process the authors try three bending

forces to see the springback progress. After experimental research hand FEM simulations it was tried to compare the

results and to find few conclusions. In this article it`s made a simulation of sheet bending process (shown the evolution

of sheet during bending operation, they see too the springback evolution after bending operation).

10.CAMBERS OPTIMIZATION BY RAPIDE GRINDING OF THROLLERS USED IN

THE PAPER INDUSTRY Petre VALEA, Eugen STRĂJESCU

Abstract: The present paper presents aspects concerning the technologies to manufacturing the cambered rollers with

different and big dimensions for the equipments for cellulosic pastes in order to obtain paper or for grain mill or

bakery. They are identified the limits of the technologies used in present and they are identified ways to their improve,

proposing research directions (including doctorate papers), having as practical purposes the improvement of the

technical and economic efficiency of these technologies. We are insisting on the rapid grinding procedure at the

manufacturing of the granite, basalt and rubber used at the superficial coverage of the rollers.



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11.EXPERIMENTAL STUDY OF MICRO HARDNESS BY FRICTION STIR WELDING

PROCESS OF AA 6061-T6 Dan Catalin BÎRSAN

Abstract: The research has been focused on characterization of the FSW joints of AA 6061T6 plates of 10 mm

thickness were friction stir butt welded at a constant rotation speed of 1180 min-1 and welding speed of 2.5 mm/s.

Variation of the material micro hardness measured transversely across the friction-stir weld over the top surface of the

work -piece plates on both sides of the joint has been performed.

12.ADJUSTABLE LIMITING CALIBERS FOR INTERIOR SURFACES Alexandru POTORAC

Abstract: The paper presents the idea and the conception of adjustable limiting calibers for interior surfaces control.

These calibers have the possibility of adjusting the dimension of the “pass” and “do not pass” sides, in a few

millimeters range, depending on the value of the nominal dimension to be checked and its tolerance and limit

deviations. For small series, these instruments can be useful in order to control interior surfaces in a certain measuring

range and to avoid the necessity of a big number of calibers and consequently the costs related to their acquisition. As

two limiting calibers with two different reading systems were realized in the “Tolerances and Dimensional Control”

Laboratory of the Faculty of Mechanical Engineering, Mechatronics and Management, "Stefan cel Mare" University of

Suceava, a set of preliminary measurements was carried out in order to evaluate the adjustment errors of these

instruments.

13.A SWARM OPTIMIZATION METHOD FOR THE FLOW SHOPSCHEDULING

PROBLEM Daniel-Ionut BANCILA, Constantin BUZATU

Abstract: This paper considers the flow shop scheduling problem with the objective of minimizing the makespan, and

can be described as: a set of n jobs that has to be processed on m machines, all the jobs having the same processing

order that cannot be interrupted. The objective consists of minimizing the maximum completion time of all the

operations or makespan. A particle swarm optimization algorithm is proposed to solve this problem which is known to

be NP-hard type. The proposed algorithm is compared with solution performance obtained by a branch & bound

technique. As a result, computational results show that the proposed method is more effective and better.

SECTION 2. MATERIALS SCIENCE AND ENGINEERING. ROOM: B 203, STAGE 1 TOPICS: Materials Science and Engineering, Micro and Nanotechnologies

Session chairs:

Nicolai BĂNCESCU

Constantin DULUCHEANU

Leonard PĂSTRĂV

1.PROCESS OPTIMIZATION OF A BIOSOURCED COMPOSITEMADE OF FLAX

FIBER AND POLYAMIDE 11 Yann LEBAUPIN, Michael CHAUVIN, Thuy Quynh TRUONG HOANG, Fabienne TOUCHARD,

Alexandre BEIGBEDER

Abstract: Flax unidirectional (UD) fabrics and Polyamide 11 (PA11) were used to create a 100% bio-sourced

composite. First of all, flax UD fabric A and PA11 in the form of powder were superimposed and placed in a mould to

create a composite. The process used for the transformation of the composite was thermo-pressing. The process

parameters: temperature and pressure moulding were varied in different configurations. An optimal configuration was

found by mechanical and DMA tests. Then, flax fiber UD fabric B and PA11 in the form of film were used to create a

composite by film stacking method using process parameters of 210°C and 65 bars. The composite made of UD flax

B/PA11 film presents the highest Young’s modulus. Finally, by applying pressure levels of 25, 40 and 65 bars on UD

flax B/PA11, the Young’s modulus remains unchanged and the failure stress is increased. These mechanical results are

in good accordance with the DMA analysis.

2.THE INFLUENCE OF ALUMINUM IN HIGH ENTROPY ALLOY FeNiCrCuAl Gheorghe BULUC, Iulia FLOREA, Adrian ALEXANDRU, Ioan CARCEA

Abstract: High entropy alloys are alloys who contain of 5 to 11 metal elements in their chemical composition. The term

high entropy alloys at first used in 1995 by the Chinese researcher Yeh. This research has greatly contributed to the

formation, development and research high entropy alloys. In this paper we describe the influence of aluminum in high

entropy alloy FeNiCrCuAl.



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3.THE YOUNG’S MODULUS AND RESIDUAL STRESS OF TiNx THIN FILMS Stela CONSTANTINESCU

Abstract: The bulge test was first conducted on the silicon nitride films to determine its proper residual stress and

Young’ s modulus which were found to be σi = 228 ± 15 MPa and E = 226 ± 10 GPa, respectively. Finally, using a

simple rule of mixture formula, the elasticmechanical properties of TiNx coatings were determined. Both the Young

s modulus andresidual stress showed increasing values with bias voltage, nitrogen to titanium ratio, and coating

density. In contrast, the effect of substrate temperature below 900o C was found to be less significant compared to other

parameters. Scanning electron microscopy of cross sectioned samples showed that coating growth occurs by formation

of equiaxial crystallites, which leads to columnar morphology beyond a thickness of 4 – 10 µm. The columns are nearly

perpendicular to the film surface.

4. ANALYSIS OF TiN AND Ti(C,N) THIN FILMS COATED BY PNCVD Stela CONSTANTINESCU

Abstract: In the Pressure Normal Chemical Vapour Deposition (PNCVD) coating technique, Spectrometry analysis

gives the concentration profiles of the compound elements from the superficial coated layer and the layer thickness.

Scanning electron microscopy is a good method than can be used in order to estimate the grain sizes of the compounds

and to have an impression about the substrate cover uniformity. A minimum roughness value is necessary for the

substrate in order to achieve a uniform and efficient covering. The XRD analyses confirm the existing of interstitial

compounds like Co3N and FeN in these zones. After the coating processes, first of all the microhardness of the coating

variants HV0,100, HV0.050 have been measured. Corrosion test in water samples covered with TiN and Ti(C,N)

channel are stronger compared with uncoated samples TiN. 3

5.THE DUAL-PHASE STEELS HARDNESS PREDICTION ACCORDING TO THE

STRUCTURE OBTAINED AFTER HEAT TREATMENT Traian Lucian SEVERIN, Constantin DULUCHEANU, Petru BULAI

Abstract: The article aims is a model data which predicts and optimize the dual-phase steels hardness according to the

structure obtained after heat treatment. To study the combined effect of temperature T (ºC) and structure obtained after

heat treatment were used a 23 orthogonal central composite experimental design for experiments design and Response

Surface Methodology for analysis of experimental results. The maximum of hardness value were found to be at T =

810ºC; in this point the surface hardness is 2178.570 HM given by empirical model and 2191.207 HM confirmed

experimentally.

6.ANALYTICAL AND MECHANICAL COMPLEX INVESTIGATIONS ON STAINLESS

STEEL 316L A.A. POINESCU, R.M ION

Abstract: Due to its high corrosion resistance, stainless steel AISI 316L is one of the ideal materials for numerous

applications such as industrial equipment and machinery, automotive, aerospace, medical instruments, etc. This paper

presents a series of mechanical and analytical investigations on 316L stainless steel. It was characterized by X-ray

diffraction by micro analysis (optical and scanning electron microscopy) and mechanical investigation (the tensile

behavior, Vickers hardness determination, the determination of surface roughness).

7.OVERVIEW ON MAGNETRON SPUTTERED TANTALUMOXYNITRIDE THIN

FILMS – STRUCTURES AND PROPERTIES

D. CRISTEA, L. CUNHA, A. CRIȘAN, D. MUNTEANU

Abstract: This paper aims to present the results concerning the structural characterization and some of the properties

of magnetron sputtered tantalum oxynitride thin films. Tantalum oxynitride thin films have been deposited by sputtering,

using as reactive gas a mixture of fixed proportion (17:3) composed of N2 and O2. The main variable parameter during

the deposition process has been the overall flow of the reactive gas mixture. A secondary variable parameter has been

the polarization voltage (grounded – GND and -50V, respectively). Thus, two sets of samples (Series 1 - -50V and

Series 2 – GND) with varying flows have been obtained. The structural characterization, evaluated by X-ray

Diffraction, has shown that the films are, for low flows of reactive gas, crystalline in nature. The raising of the reactive

gas flow leads to the formation of quasi-amorphous films. The exhibited properties were shown to be closely related

to the structural evolution of the films.



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8.RESEARCHES ON THE EMULSIFIED OIL SYNTHETIC QUENCHING

ENVIRONMENT Ion HOPULELE, Carmen NEJNERU, Mihai AXINTE, Manuela-Cristina PERJU, Catalin-Andrei TUGUI

Abstract: Using synthetic quenching media is relatively new and offers advantages such as non-flammability, safety of

use and low cost price. Heating medium to be tested is emulsifiable oil dissolved in water at various concentrations, the

test temperature being 30°C. By dissolving water is obtained a synthetic solution with low viscosity, tension reactive

and lubricating properties. In the paper were measured cooling curves for specified synthetic media and calculated for

the same media the cooling rate variation and heat transfer coefficient on intervals. The experimental data were

compared with those obtained from traditional media: water and heat treatment oil TT 50.

9.THEORETICAL ASPECTS ON THE MICROMECHANICS COMPOSITE MATERIALS Doina TARABUTA (ENE), Constantintin D. STANESCU, Mariana PATRASCU (ANTONESCU), Melania

TAMAȘ

Abstract: The efficiency of a composite material is distinguished by the top level of the technical characteristics and its

properties. For their study, it appeals to a number of considerations, such as: minimum dimensions of the primary

elements of reinforcement section, made up of fibers or threads; the high volumetric fraction (Vf> 0.5); knowledge of

the geometry of reinforcement phases. These considerations lead to the concept of composite plate.

10.THERMAL SPRAYING OF CU10AL POWDER ON COPPER Ionut Claudiu ROATA, Alexandru PASCU, Elena Manuela STANCIU

Abstract: In this paper is emphasized the influence of metallizing distance on the microhardness and porosity of the

layer coated by using Cu10Al powder. In order to perform the samples, CastoDyn DS800 thermal spraying unit was

used and also the SSM 10 metallizing modulus. After the samples analysis, an improvement of the diffusion zone is

noticed and also an increasing of the microhardness for the samples where the metallizing distance decreased to100

mm. The interface with the base material is very good, without detachments, and the screwed aspect resulting from

mechanical working, is distinguishable.

11. DISSIMILAR LASER WELDING OF CARBON STEEL AND STAINLESS STEEL Elena Manuela STANCIU, Alexandru PASCU, Ionut Claudiu ROATA, Mircea Horia TIEREAN

Abstract: This paper addresses to the laser welding of dissimilar materials. AISI 1010 and AISI 304 thin sheets are

laser welded in lap joint geometry. The experimental tests were conducted using an Nd:Yag laser with wavelength in

the near infrared field. The welded samples present a good geometry profile without pore or positioning defects. The

mechanical behavior is investigated by means of micro-hardness analyses and tensile testing. Good tensile results were

obtained as the specimens were fractured on the low carbon steel side.

12.MATERIALS PROCESSING WITH LASER Elena Manuela STANCIU, Alexandru PASCU, Georgiana CHISIU, Ionut Claudiu ROATA

Abstract: This paper addresses to the laser technology of processing metallic materials. The paper shortly describes

the main laser industrial processes that use laser radiation: cutting and welding. The new types of fiber or disk lasers,

characterized by very good wall plug efficiency are well suited for high speed cutting or to precision welding. Laser

welding has a wide applicability in micro laser cutting or welding as well as in industrial processing of materials with

thickness up to 20 mm. Nowadays many industry change their conventional equipments to the laser processing

technology.

SECTION 3. APPLIED MECHANICS. ROOM: B 101, STAGE 1

TOPICS: -Mechanical Engineering; Applied tribology; Maintenance, Reliability, Life Cycle

Session chairs :

Ilie MUSCĂ

Valeriu CERTAN

1.STUDY ON THE ABILITY OF OPERATION OF BEARINGS WITH SLIP FRONTALLY

SUPPLIED WITH LUBRICANT

Valeriu CERTAN, Vasile RAȚĂ-MUNTEAN Abstract: Starting from O. Reynolds’s equation for pressure in film of a radial bearing with slip with circular

movement of length, the present paper presents the study of the main characteristics which lead to establishing their

abilities to operate. Based on the results obtained, the technological design and working parameters will be optimized

to ensure operating in a fluid regime of friction.



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2. REDUCING THE INTERNAL FRICTION OF THE PUMPS WITHEXTERNAL

GEARING

S. L. Alexiev Abstract: It is known that, in pumps with external gearing is obtained, called by different authors, squeezed or pinched

volume of hydraulic fluid in the area of double gearing with coeficient of overlapping close or equal to 1.

3. DYNAMICS OF HYDRAULIC DRIVE OF HANGING SWEEPING EQUIPMENT OF

DUST-CART WITH EXTENDED FUNCTIONAL POSSIBILITIES O.V. Berezyuk, V.І. Savulyak

Abstract: Simplified mathematical model of the hydraulic drive group of series connection hydraulic motors of hanging

sweeping equipment of dust-cart is offered. Approximate analytical dependencies of pressure on inputs of hydraulic

motors and the angular speeds on shafts of motors from time and the main parameters of hydraulic drive are obtained.

4. PNEUMOPULSE DRIVE VIBRATING BUNKER CONTROL OVER THE MOVEMENT.

BASIS DESIGN CALCULATIONS

R. R. Obertykh, A. V. Slabkiy Abstract: The article presents the method of calculating the pneumopulse drive of the original design vibrating hopper.

5. ELASTOHYDRODYNAMIC LUBRICATION OF PLAINJOURNAL BEARINGS -

SQUEEZE FILM EFFECT

Juliana JAVOROVA, Anelia MAZDRAKOVA Abstract: The study is performed using a designed and verified model of a dynamically loaded journal bearing with

finite length. The bearing sleeve is covered with a thin elastic coating whose radial distortions are of the same order of

magnitude as the film thickness. The elastic part of problem is investigated in accordance with the Vlassov model of an

elastic foundation. The Reynolds equation for 2-D non-steady state problem is derived. The numerical solution is done

by FDM with over-relaxation procedure. The presented results are obtained for prescribed loci of the shaft centre

which corresponds of squeeze film effect.

6. ELASTIC DEFORMATIONS EFFECT ON HD LUBRICATION OF RADIAL JOURNAL

BEARINGS

Anelia MAZDRAKOVA Abstract: The present paper is aimed to study the deformability effect of the bearing surface on the lubrication

performance of cylindrical journal bearing with finite length. The bush is coated with thin resilient layer with smooth

surface. The steady state EHD problem is investigated under elasticity conditions in accordance with a Vlassov model

of an elastic foundation adapted for thin liner. The Reynolds equation is solved numerically by successive over-

relaxation technique on a finite difference grid. The converged solutions for the lubricant flow and elastic deformations

are obtained. The variety of simulation models of the tribological system is presented. The comparative analysis

between the solutions by hydrodynamic (HD) theory and elastohydrodynamic (EHD) theory of bearings lubrications

carried out.

7. COMPARATIVE STUDY ON THE RHEOLOGICAL BEHAVIOUR OF SOME

INDUSTRIAL ECOLOGICAL LUBRICANTS

Iuliana–Marlena PRODEA, Nicoleta TEODORESCU, Mariana-Florentina STEFANESCU, Ancaelena Eliza

STERPU, Cyrille Alode VODOUNON Abstract: In this paper is analyzed the rheological behaviour of some ecological lubricating greases - produced on

base of vegetable oils- potentially applicable in the food industry (manufacturing equipment, packaging etc.). The aim

is to evaluate, based on the rheological experimental determinations, the lubrication ability of studied greases.

8. INFLUENCE OF THE GREASE ON FRICTION IN BALL-RACE CONTACTS Gelu IANUS, Alina – Corina DUMITRASCU, Dumitru N. OLARU

Abstract: The authors investigated experimentally the friction torque in a modified thrust ball bearing having only 3

balls operating at very low axial load and lubricated with greases. The experiments were realized by using spin-down

methodology and the results were compared with the theoretical values based on Biboulet- Houpert’s rolling friction

methodology. A very good correlation between experiments and theoretical methodology has been obtained for

synthetic grease SSX having base oil viscosity of 1000 mm2/s.



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9. INFLUENCE OF THE CAGE ON THE FRICTION IN LOW LOADED THRUST BALL

BEARINGS

Mihaela Rodica BALAN, Ana TUFESCU, Marcelin BENCHEA, Dumitru OLARU Abstract: The authors investigated experimentally the friction torque in a thrust ball bearing operating at very low

axial load in lubrication conditions. The experiments were realized by using spin–down methodology. The results

evidenced the influence of the sliding friction between the cage and the balls on the total friction torque. It was

concluded that at very low loads the friction between cage and balls in a thrust ball bearing has an important

contribution on total friction torque.

10. INFLUENCE OF THE MAGNETIC FIELD ON THE DYNAMIC MECHANICAL

PROPERTIES OF MAGNETORHEOLOGICAL ELASTOMERS Petrică-Eduard CHIRILĂ, Doina BOAZU, Nicuşor BAROIU

Abstract: Machinery and buildings often have to be protected from vibrations. During the past two decades the interest

in intelligent material based solutions has shown a huge growth The needed reduction of dynamic response can be

achieved efficiently with semi-active isolation. One way to use semi-active isolation is to install vibration isolators

between the base and the object to be protected and control the dynamic properties of these isolators.

Magnetorheological Elastomer (MRE) are a kind of smart material whose mechanical, electrical and magnetic

properties are controllable under applied magnetic field. The effect of particle concentration, the intensity of uniform

magnetic field as well as the spatial distribution of particles on the magnetic field may induce different behaviors of

these materials. Finite element models presented in this paper are taking into account magneto-rheological materials

as a part of automotive shock absorbers and building foundations for taking over seismic shocks.

11. STRESS DISTRIBUTION FOR A PISTON WITH A ZrO2/20%Y2O3 TOP LAYER

DEPOSITED ON THE PISTON HEADS WHICH ABSORBS GAS PRESSURE Eduard Sebastian BÂRCĂ, Mihaela Roxana VLADU, George MAHU, Mărioara ABRUDEANU, Corneliu

MUNTEANU

Abstract: The forces acting on the piston, in the case of a normal operating regime are inertial forces and pressure

force due loosen gases in the combustion chamber. For structura analysis of the piston was considered that it is at TDC

and the only force acting on it is due to flue gas pressure. The piston is considered leaning in the bearings and is

allowed only after a single axis movement. The method used to determine the state of stress and thermal behavior is the

finite element method. For the finite element analysis were conducted CAD models of piston and piston with top layer

assembly.

12.THE OPTIMIZATION OF DIRECTING EMPTY WAGONS

Mihaiela HERMAN, Gabriel-Vasile URSU-NEAMȚ, Horea STIRBU

Abstract: In this paper we will show how to apply the exact method of covering zeros at the transport problem of

guiding empty wagons between two excess and deficiency centers after establishing the mathematic pattern. To

automation and reduce the calculus volume for this method it is implemented on PC by using SOLVER, a component of

EXCEL from MICROSOFT OFFICE PROFESSIONAL 2013.

13. FINITE ELEMENT ANALYSIS OF AN ANKLE JOINT REHABILITATION

EQUIPMENT Ioana Mădălina PETRE

Abstract: The aim of this article is to present a simulation of a pneumatic muscle actuated rehabilitation equipment for

the ankle affections using CATIA V5R19 Software. The rehabilitation equipment allows performing isokinetic exercise,

being known that those are the fastest way of recovery the areas affected. It is presented the equipment to be analyzed,

the material, type of analysis, the constraints and the loads applied. After analyze is made, the soft shows the results,

which are interpreted. The results of the analysis, Von Misses stresses and displacements show the resistance of the

equipment under the imposed requirements.

14. SIMULATION OF MAS-20-750N-AA-MC-O-ER-BG PNEUMATIC MUSCLE USING

FEA METHOD Ioana Mădălina PETRE

Abstract: The aim of this article is to present a simulation of a pneumatic muscle behavior by means of finite element

analysis. The pneumatic muscle analyzed is a FESTO type muscle, of 20-mm diameter and length of 750 mm, with

MAS-20-750N-AA-MC-O-ER-BG code. This kind of actuator replaces successfully the electric drives used until now.

So, recently it can be observed an increasing utilization of the pneumatic muscle as actuator in different domains,

because of their favorable characteristics. The results of finite element analysis shows the behavior of the muscle - the

volume expansion, the stroke that is capable to realise and the inflation pressure released into membrane.



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15. ON THE VALIDITY OF THE PRESSURE-VELOCITY CRITERION FOR THE PURE

SLIP SCUFFING

Michaela FOMIN, Ilie MUSCĂ Abstract: In scuffing conditions, the value of the product of the hertzian pressure of contact and the sliding speed

generally remains constant. The experimental results reveal that the micro-topography of the contact area has also a

determining role in the evolution of the wear and tear and the emergence of severe damages with high scuffing risk The

experimental researches and fitting analysis presented in this paper reveals a good validity of the pressure-speed

criterion also in the case of the pure slip conditions of experiments

16.STUDY ABOUT FLOW RATE OF IMPELLERS USED FOR ACHIEVEMENT OF

SOLID PARTICLE SUSPENSIONS

Constantin TACĂ, Georgeta ROMAN, Angela CHELU Abstract: A new mathematic model for the flow rate of the impellers with axial discharge was deduced due to the

methods of dimensional analysis. Through experimental determinations the general calculation relation was

particularized for the case of the six 45o- pitched blade turbine. Research results are presented by graphics, depending

of impeller’s parameters: speed, diameter and width of blades. Experimental data are used for establishing a general

relation of impeller flow rate, taking into account the liquid density and viscosity.

17.PRELIMINARY EXPERIMENTAL INVESTIGATIONS REGARDING THE

SPECIFICITY OF THE FIRING PIN IMPRINT Ioan LESENCIUC, Cornel SUCIU

Abstract: The identification of firearms is currently done by studying traces left on the bullet or the case, found during

onsite investigations. In the case of shotguns, as the trace carrying projectile is missing, weapon identification can only

be done by studying traces left on the shell. Unlike traces left on the bullet, those left on pellet cartridges, can at present

only lead to weapon identification if the rifle is found immediately after the event and the obtained comparison model

allows the identification of characteristics similar to those of the found shell. This paper presents preliminary

experimental investigations conducted in order to find particularities of the imprint left on the primer cup by the firing

pin. To that purpose, the surface microtopography of the primer cup was mapped by aid of a laser profilometer, and

various particularities are highlighted.

18. EXPERIMENTAL INVESTIGATIONS UPON THE IDENTIFICATION OF SPECIFIC

CHARACTERISTICS OF HUNTING RIFLES FROM THE FIRING DISTANCE Ioan LESENCIUC, Cornel SUCIU

Abstract: A key priority for judicial ballistics is to determine the shooting distance, defined as the path of the bullet, or

that of the bundle of shots, as appropriate, from the muzzle to the entry point. In order to achieve that goal when the

weapon is unavailable for model comparison, other elements are considered, such as traces of gas actions, the muzzle

imprint, traces of smoking due to powder burning as well as other traces (grease, metal etc.). Once the firing distance is

determined, (and concentration, in the case of shots), several characteristics of the firing weapon can be determined,

such as choke size, barrel length etc. The present paper advances experimental investigations to determine specific

characteristics of hunting rifles from the firing distance and shots concentration at the entry point. For that purpose,

several 12 gage rifles were used, but with different choke sizes and barrel lengths.

19. DEVICE, METHOD AND PRELIMINARY RESULTS OF ROLLING FRICTION

COEFFICIENT EVALUATION Sorinel Toderaș SIRETEAN, Ilie MUSCĂ

Abstract: This paper presents a test rig and an experimental method for the rolling friction coefficient evaluation, in

the case of a contact between a ball and an outer ring from a ball bearing. The ball is free positioned on the outer ring

raceway and, at zero speed, it will stay in the position corresponding of the minimum potential energy. The ring can be

rotated with a controlled speed. Due to the rolling friction effect, the ball will get a new equilibrium position, deviated

from the initial one, with a deviation angle. This angle is in correlation with the rolling friction coefficient and allows

calculating it. After a short presentation of the previous device, this paper presents the upgrading elements and the new

experimental method. This new method allows to evaluate the dynamic rolling friction coefficient but also the static one.

Some experimental results are presented too.

20. ABOUT BALL JOINT HOUSING HOT FORGING DIE WEAR Alin D. GRAUR, Ilie MUSCĂ

Abstract: The hot forging represents a very economical procedure for obtaining a rough part, from the material

consumption point of view. During the forging process, mechanical stress and strains occurs at the relative flow

between the die and the workpiece, and wear will appear. This paper presents a case study of this interaction in order

to highlight the areas with risk of wear, for a particular case, respectively the forging of an automotive ball joint

housing. In the paper closure some practical and useful conclusions in design are presented too.



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SECTION 4. ENVIRONMENTAL AND QUALITY MANAGEMENT. ROOM: B 102, STAGE 1

TOPICS: Engineering Management and Leadership; Innovation, Creativity and Industrial Development; Quality

Management; Environmental Engineering and Sustainable Development; Learning and Education in Engineering

Session chairs :

Mircea CIOBANU

Alexandru POTORAC

Costel MIRONEASA

1.SOIL MONITORING OF VANATORI – GALATI REACREATIONAL AREA Mircea Viorel DRAGAN

Abstract: Soil is subjected to various human interventions such as: industrialization and urbanization. The level or the

degree of soil’s pollution can be determined either by reducing the quality and quantity of crop production, either by

refurbishment expenses necessary to increase soil’s productivity and its fertilisation. Soil pollution is closely linked to

the air and water pollution, therefore this have a straight impact on the flora and fauna.

2. STUDIES ON AIR QUALITY MONITORING IN GALATI CITY AREA Mircea Viorel DRAGAN

Abstract: Human society developments lead to the creation of a negative anthropic and technological impact on the air

quality. The dispersion of pollutants in the atmosphere is a particularly dangerous phenomenon, hard to estimate and

with unpredictable effects. Air is the environmental factor which constitutes the fastest way to transport pollutants

around the globe. Air has a significant impact on life on Earth, thus monitoring and controlling its quality is a very

important factor.

3. UNDERWATER ACOUSTIC FIELD PARAMETERS MODELING Mihai ARSENE, Delia GARLEANU, Claudia BORDA, Marinela MARINESCU, Victor POPOVICI

Abstract: This paper presents the results of studies conducted in the Black Sea regarding the underwater acoustic

pollution. One of the parameters of the acoustic field is the underwater transmission loss; it was measured and then

modeled using a specialized software. Measurement procedure is described and are presented the graphical results of

the measurements and of the modeling of transmission loss. Measurements were compared with modeling results and

found that there is little difference between them, as predictable and acceptable level of transmission attenuation.

4. UNDERWATER ENVIRONMENT SOUND SPEED MODELING Mihai ARSENE, Gabriel GÂRLEANU, Larisa BUŢU, Delicia ARSENE, Victor POPOVICI

Abstract: The paperwork presents the results collected and modeled regarding the sound speed variation in the marin

environment. Measurements aimed to raise speed sound –depth profile on 9 alignments (in the port of Constanţa).

There were also made comparisons between data received through direct measurements of sound speed and sound

speed computation. The modeled results are to be used as entrance data in the transmission loss modeling.

5.RESEARCH REGARDING THE FILTRATION OF POLLUTED AIR FROM AN

WORKING ENVIRONMENT USING ULTRASONIC FILTERS Gheorghe AMZA

Abstract: This paper presents a novel method of filtration and purification of air within an exigent working

environment (museums halls, operating theaters, controll rooms etc.) by the use of ultrasonic field. After an analysis of

the main disadvantages of classical methods and tehnologies for air filtration and purification, an ultrasonic filter is

proposed, designed based on the ultrasonic vibration and cavitation. A schematic drawing is presented together with

the computation elements for the design of an ultrasonic system that can be used for such a filter. Experimental results

for the purification and filtration of air in an exigent working environment are also presented. The experimental results

demonstrate the efficiency of 100% retention of solids and liquids larger than 0.1 μm with an efficiency of 100% and

those of smaller dimensions of 0.1 μm with an efficiency of 98.2%

6. INNOVATION IN COMPLEX SYSTEMS USING VALUE ANALYSIS AND TRIZ Gabriela Mariana IONESCU

Abstract: This paper presents the application of a new methodology, called AVTRIZ for redesigning a complex system

of curved profiles and pipes production. AVTRIZ methodology was developed by combining Value Analysis and

Engineering with TRIZ method. The dual approach in the technic and management domains there were established

several innovative solutions based on technological forecast, which led to lower manufacturing costs and increased

flexibility of the system.



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7. INVENTORY OF INDUSTRIAL LAND FIELD USING AN KRIGING ALGORITM IN

GALATI AREA Dănuţ LEFTER, Lucian P. GEORGESCU, Daniela L. BURUIANĂ, Ina I. HUMENIUC

Abstract: The city of Galati is situated in the geographic center of the largest hydrographic basin in Europe being in

the same time, together with Braila city one of the most important industrial area in Romania. The present paper

presents the inventory of same less knowing sites having complex pollution potentials affective same natural protect

areas as Lower Siret basin. The present research in are on multicriterial monitoring points complex with prognosis

using Kriging method. Interpolation methods estimate the values in unsampled locations. The mapping and spatial

analysis often requires converting the field measurements into continuous space. Therefore the point data sets must be

converted to a continuous form using an interpolation method. The errors, however, enter the spatial database long

before any interpolation method is applied to the data set. The first type of error is associated with sampling design.

The magnitude of a sample, as well as the procedure of obtaining it, depend on the objectives of the sampling process,

and consequently vary with these objectives. Increasing the sample size also improves the accuracy of measurements up

to a certain point. In spatial analysis the sampling is often performed on a regular grid or on an irregular set of points

however, this might not depict the true variation of studied phenomena in the space.

8. STATISTICAL ANALYSIS OF NO2 CONCENTRATION IN BRAILA CITY, ROMANIA Carmelia Mariana DRAGOMIR, Mirela VOICULESCU, Daniel Eduard CONSTANTIN, Lucian Puiu

GEORGESCU

Abstract: This paper presents a five-year data analysis (from 2009 to 2013) of ground-level NO2 concentration

recorded by four air quality monitoring stations in the urban area of Braila city, Romania. The study was based on NO2

concentration data and seven meteorological parameters (wind direction, wind speed, air temperature, precipitation,

relative humidity, solar radiation and atmospheric pressure. Principal Component Analysis (PCA) was used for

identifying statistical distribution. The Multivariate Analysis (one-way ANOVA) was used to determine if there are any

variation between independent groups and a continuous dependent variable. Principal Components Analysis was used

to evaluate the entire set of data consisting in meteorological variables and NO2 concentration.

9. MEASUREMENTS OF NO2 USING A MOBILE DOAS SYSTEM IN GORJ COUNTY,

ROMANIA Daniel Eduard CONSTANTIN, Mirela VOICULESCU, Mariana Carmelia DRAGOMIR, Lucian Puiu

GEORGESCU, Alexis MERLAUD, Michel Van ROOZENDAEL

Abstract: In this work we present Differential Optical Absorption Spectroscopy (DOAS) measurements performed on

board of a motor vehicle in Gorj County, Romania. The mobile DOAS system used is based on a UV-VIS spectrometer,

a fiber optic, a telescope, a GPS system and a portable PC. The target trace gas is the nitrogen dioxide (NO2). The

measurements were performed on July, 19th 2013, in the area of two important industrial power plants located nearby

Rovinari and Turceni city. The recorded spectra were analyzed with the QDOAS software to produce NO2 Differential

Slant Column Densities (DSCDs). During our measurements, close to the power plants, very large amounts of NO2

(~1.2x1017molec./cm2) were detected.

10. INFLUENCE OF METEOROLOGICAL PARAMETERS ON ENERGY EFFICIENCY

OF BUILDINGS Adrian ROȘU, Mirela VOICULESCU, Lucian Puiu GEORGESCU, Daniel Eduard CONSTANTIN

Abstract: This paper presents a study of possible effect of meteorological parameters on the energy efficiency of

buildings. The particular case of an office building is presented. The influence of the meteorological parameters

(temperature and humidity) on temperature of exterior walls temperatures of buildings was analyzed. The building

selected for the study has a meteorological station placed on top, thus local meteorological data are available. The

temperature of exterior walls was measured using an infrared camera FLIR I7. All data were collected in winter time

due to temperature difference that occurs between heated building and atmosphere.



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11. ASSESSING THE HEAVY METALS CONTENT FROM AQUATIC COMPLEX

GORGOVA UZLINA FROM THE DANUBE DELTA, ROMANIA Cătălina Maria ŢOPA, Adrian BURADA, Cătălina ITICESCU, Lucian P. GEORGESCU, Gabriel

MURARIU

Abstract: Through this study we aimed to evaluate and determine the accumulation of heavy metals content in aquatic

complex Gorgova - Uzlina, located in the western part of the Danube Delta Biosphere Reserve, between the arms

Sulina and Sfantu Gheorghe. In order to evaluate heavy metal content there were selected a total of 3 lakes: Isac,

Uzlina and Cuibul cu Lebede, considered representative for this aquatic complex. We determined the concentrations of

five heavy metals (chromium, nickel, lead, manganese and zinc) with significant impact on the health of ecosystems,

from sediment samples and two species of aquatic vegetation specific to wetlands, namely: Phragmites australis and

Typha angustifolia. Monitoring activity in the aquatic complex Gorgova-Uzlina was conducted over a period of 5 years.

The frequency of sampling was seasonal (spring, summer, autumn), three times a year on each lake and in the same

station during the mentioned period. For statistical analysis there were considered average annual values. Based on the

results obtained, it is observed that the maximum permissible concentrations were exceeded according to the European

Water Frame Directive and changes in concentrations of heavy metals are influenced by the significant contribution of

upstream Danube input, loaded with various types of pollutants resulted from industrial and agricultural activities.

12. USE OF SEWAGE SLUDGE FROM THE WASTEWATER TREATMENT PLANT IN

TECUCI - GALATI COUNTY AS FUEL Dumitru DIMA, Monica MURARESCU, Cătălina ITICESCU, Lucian GEORGESCU, Maria Cătălina ȚOPA

Abstract: The aim of this paper is an extended study over 12 months, concerning the nature of sludge obtained from a

treatment plant and the possibility of its treatment by combustion. The analysis of structural and morphological

characteristics of sewage sludge was performed, by SEM and EDAX techniques. Thermal analyses were performed on

sludge samples by DSC and bomb calorimeter techniques. Thermal analyzes were performed both on sludge samples

with unmodified composition and sludge samples mixed with metallurgical coke in order to determine the optimal

concentration of sludge in coke to be sold as fuel. The concentrations of sludge in the coke ranged from 0.5 to 10

percent. Experimental determination of the calorific content was compared with the calculated value. The incineration

method of sewage sludge is possible, but only at lower concentration values than 2% wt. At this concentration, some

certain deviations already appear in terms of a complete combustion of organic substances under these circumstances.

The calorific content was determined using the bomb calorimeter.

1530 – 1600 COFFEE BREAK

1600–1700 SEMINAR "MANAGEMENT OF RESEARCH", PERFORM PROJECT - POSDRU

138963/2014, Mirela VOICULESCU, „Dunărea de Jos” University of Galați, Sala ADL, Corp D

1600 – 1900 PARALLEL SESSIONS – SECTIONS. STAGE 2

SECTION 1. MANUFACTURING TECHNOLOGIES. ROOM: B 214, STAGE 2 TOPICS: Manufacturing Technologies; Cold Forming Technologies; Welding Technologies; Nonconventional

Technologies; Manufacturing Systems; Mechatronics, Robotics and Flexible Manufacturing; Computer-Aided Design,

Computer Aided Manufacturing

Session chairs:

Romeo IONESCU

Eugen STRĂJESCU

Lucian SEVERIN

14. CONSIDERATIONS ON OPERATING TECHNICAL SYSTEMS Vasile RAȚĂ, Valeriu CERTAN

Abstract: A technical system displays a specific working capability. This can be damaged as a result of failure or a

failure condition that contributes to reducing technical or economic performance. It is important that a mathematical

model for characterizing the operating status at a given time in the life of the technical system to be found. The present

paper is an attempt to establish the size of the ability to operate at a given moment in a normal period of operation.



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15.THE 3D LIQUID WOOD SHEETS FORMING THROUGH A VACUUM PROCESS Daniel CHIRITA, Simona PLAVANESCU (MAZURCHEVICI), Dumitru NEDELCU

Abstract: The plastic materials are involved in a multitude of important processes having a major influence on our

everyday lives. Their applicability can be found in all activity area. The use of fossil fuels is more important nowadays

because of their limited reserves. It is essential to search and develop alternatives to fossil-based materials that can

complete, replace them with success. In this way the renewable resources are a crucial area in the search for

alternatives to common plastics. To develop new products from renewable resources it is required to perform a

multidisciplinary research at a highly technological level. To meet this need, the German Fraunhofer Institute for

Chemical Technology together with Tecnaro GmbH Company have made studies and developed, a thermoplastic

material – deformable under heat – based on natural resources (wood components) - a new material named “liquid

wood” which can be processed in the same way as thermoplastics. "Liquid wood” is available in three different

versions: ARBOFORM® Liquid wood 100% biodegradability (based on lignin, organic additives and natural fibers),

ARBOBLEND ® plastic composite with wood 80% biodegradability (its content is based on biopolymers degree, e.g.:

lignin, starch, natural resins, wax and cellulose), ARBOFILL® biopolymeric composite 60% biodegradability

(polymers and natural fibres-based compound provided with natural cork aspect). “Liquid wood’ has better thermal

and mechanical properties than wood and plastic put together. It is a biodegradable thermoplastic engineering

material of superior quality and strength that will meet the technological demands replacing the indomitable market

giant-plastic. “Liquid wood” granules can be processed by different procedures, i.e. injection moulding, extrusion,

calendaring, blow molding, deep drawing or pressing into moulded parts, semi-finished products, sheets, films or

profiles. The paper presents equipment that consists in a metal oven that has an enclosure with constant thermal

environment. It uses the vacuum thermoforming technology which consists in hot shaping of plastics. As a principle, the

thermoforming process involves the heating of sheet (in this case of "liquid wood") and the formation of product under

vacuum, on the mold. Special attention should be given to the mold surface quality to ensure a perfect vacuum and fines

vacuum holes. The thermoforming device can have concave or convex form. The most beneficial aspects of

thermoforming it is the effectiveness in terms of production costs and limiting production cycle. With this equipment can

be obtained a variety of items such as interior automotive parts, protective casings, transport containers and packing,

recreational and sports equipment, medical equipment and supplies for industrial purposes.

16.EMPLOYMENT OF DIGITAL HUMAN MODELS IN THE EVALUATION OF

ASSISITVE WALKING AIDS FOR ELDERLY USERS Ana-Maria Adina SUTEU, Constantin BUZATU

Abstract: Increasing age is often associated with a rise in other impairments, such as osteoarthritis, reduced hearing

and vision or general frailty, leading to mobility problems. Thus, it results the need for specially designed products,

most commonly solved by assistive technologies, the employment of which enables independent functioning, yet,

issues of usability, safety and acceptance remain to be solved. The use of digital human models (DHM) is one of the

most common techniques employed in testing and improving certain features of a system or product. Taking into

consideration these factors, this paper proposes the usage the Human Builder module in CATIA V5 in order to develop

two human models, generated with anthropometric data collected from a group of over 65 years old participants,

residents in an assistive care center. The models are further employed in testing the safety and comfort level of the most

commonly used walking aids currently considered by the participants.

17.EXPERIMENTAL STAND FOR THE STUDY OF THE FUNCTIONING OF

MAGNETIC LEVITATION VEHICLES Mihaela HERMAN, Horea ȘTIRBU, Richard HERMAN

Abstract: Each person allocates a considerable amount of time to moving around, with or without transportation

means. For the movement to be minimal, people search for ways to use those systems and transportation means with the

smallest duration for the considered distance. A solution for this is nonconventional transportation, especially magnetic

levitation solutions. An experimental stand has been realized for the study, in a didactical and research context, of the

vehicle behavior. This stand reproduces, at scale, the characteristics of a nonconventional magnetic levitation

transportation system.

18.DISTRIBUTED CONTROL SYSTEM FOR MACHINING PROCESS OPTIMIZATION

IN DRILLING MINERAL COMPOSITES REINFORCED BY 3% GLASS FIBERS

M. ILIESCU, C. SPIRLEANU, A. PATRASCU, L. VLADAREANU

Abstract: Development of mineral composites has been continuous while the last decades, due to their impressive

characteristics and, therefore, application to various constructions, such as bridges, buildings, pavements, etc. This

article is aimed at evidencing aspects of the drilling process of mineral composites reinforced by 3% glass fibers. The

focus is on drilling experiments for determination of regression models of force and moment, as well as on the

decentralized and distributed control system for monitoring force and moment values.



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19.THE DETERMINATION OF THE OPTIMAL VALUES FOR SOMEPARAMETERS IN

DEEP DRAWING OF CYLINDRICAL CUPS WITHOUT A BLANK HOLDER Dan CHIORESCU, Gheorghe NAGÎȚ, Oana DODUN, Ștefan MIHALACHE, Alexandru GOLDAN

Abstract: This article investigates the influence of the die punch clearance, the average velocity in the active stage and

the lubrication on the deep drawing quality expressed by the thickness evenness on the finished product surface. In

order to minimize the number of experimental trials, a fractional factorial design was developed together with an

orthogonal array, thus analyzing the contribution of the three parameters under study to the quality of the deep drawing

process. Using TAGUCHI’s signal-to-noise ratio, we determine that ram velocity has a major influence, followed by the

clearance between the active elements, while the contribution of lubrication is low. The results of the research are

useful in developing a sensible design of experiments.

20.EXPERIMENTAL RESEARCHES CONCERNING BEHAVIOUR ON CUTTING BY

TURNING OF STEELS FOR MAGNETS, NDFEB BASED Melania TAMAŞ, Doina ENE; Mariana ANTONESCU

Abstract: This paper presents experimental research concerning the behavior on cutting by turning of steels for

magnets NdFeB based. In this context, cutting by rough turning of steels magnet neodymium and ferrite boron based

were performed. Turning processing with the values of the cutting parameters recommended by European Union and

Sandvik Coromant company rules, taking into account the chemical composition of the processed material and cutting

tool were performed. The tables have been drawn up with the values of cutting forces. By comparing these data it can

be concluded that steels for permanent magnets, NdFeB based have acceptable behavior, the process by rough turning.

A full assessment of the optimization of the cutting by turning process of steels for permanent magnet, NdFeB base will

result from subsequent experimental research that will take into account the wear of cutting tools and quality

(roughness) of processed surface.

21.INVESTIGATION OF MATERIAL REMOVAL RATE IN ELECTRICAL DISCHARGE

MACHINING (EDM) OF SMALL CYLINDRICAL SURFACES Irina BEȘLIU, Margareta COTEAȚĂ, Laurențiu SLĂTINEANU

Abstract: Electrical discharge machining (EDM) is one of the most used non-traditional machining processes. The

process uses in order to detach and remove the unwanted material from the part surfaces thermoelectric energy that

allows the development of electrical discharges between the workpiece and an electrode that are positioned in a

dielectric environment. The major advantages of this machining process are reflected on its capability to cut precisely,

geometrically complex material regardless hardness. Electrical discharge machining can be applied in order to detach

cylindrical parts from a workpiece made of electroconductive material. This paper presents an investigation on the

effect of some machining parameters on the material removal rate (MRR) in electrical discharge machining (EDM) of a

small cylindrical.

22.CONSIDERATIONS ABOUT GEOMETRIC MODELING OF COMPLEX SURFACES

USING A POINT CLOUD RESULT FROM THE SCANNING OPERATION Vlad-Constantin MANOLIU, Dumitru AMARANDEI

Abstract: The paper present the possibility to generate a complex surface using a point cloud result from the scanning

operation at the real solid with a 3D scanner. Also, there is presented a way to optimize the scanned part with an eye to

import the scanned part into 3D Unigraphics NX design software and different possibilities to achieve the solid body

using a point cloud.

23.ANALYTICAL MODELING OF SURFACE INTEGRITY - RECENT TRENDS AND

ADVANCES- Cristina- Iuliana BALAN

Abstract: The fast technological development generated an acute need for high quality machined components,

especially in the automotive industry. During the past few years, researchers all over the world focused on creating

theoretical models f or different surface integrity (SI) parameters. These models are extremely important because they

allow the prediction of the real values of the SI parameters, thus enabling the computer aided process planning and, at

the same time offer a reduction of machining time and costs. The present paper offers a review of the recent trends and

advances in analytical modeling of surface integrity parameters: roughness, residual stresses and microstructural

alterations.



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23.A REVIEW IN SURFACE INTEGRITY IN HIGH SPEED MACHINING OF

HARDENED STEEL

Cristina- Iuliana BALAN

Abstract: Steel parts, generally, have to be machined after heat treatment, in order to obtain both the correct shape

and the desired surface finish. However, during the past few years, high speed machining (HSM) has emerged as an

effective method for increasing efficiency, quality and accuracy of the machined surface, and also to reduce costs and

machining time. The present paper provides an overview of high speed machining induced surface integrity in hardened

steels. There are many types of surface integrity (SI) problems reported in literature, among those being surface

roughness, residual stresses, white layer and work hardening layers, as well as microstructural alterations. From the

multitude of parameters influencing the SI of a machined surface, cutting conditions, cutting tool characteristics,

workpiece material properties and machine tool rigidity appear to be the most significant.

24.CONSIDERATIONS ABOUT THE MANUFACTURING OF HARD MATERIALS USED

IN THE DIE REALIZATION ON HAAS VM-3 CNC MACHINE PETRU AILENEI, Dumitru AMARANDEI

Abstract: The paper illustrates modern techniques of manufacturing of hard materials used for the realization of the

dies for the hot forging process. The materials that will be manufactured are tool steels for hot and cold forging. These

types of steels will be manufactured before and after will be heat treated. The materials will be manufactured on a

CNC machine HAAS VM-3. This CNC machine is special designed for the realization of dies and molds.

SECTION 2. MATERIALS SCIENCE AND ENGINEERING. ROOM: B 203, STAGE 2 TOPICS: Materials Science And Engineering, Micro and Nanotechnologies

Session chairs:

Nicolai BĂNCESCU

Constantin DULUCHEANU

Ion HOPULELE

13.INFLUENCE OF THE LASER POWER ON THE GEOMETRY OF LASER CLADDING

WITH NI BASE POWDER Alexandru PASCU, Elena Manuela STANCIU, Ionut Claudiu ROATA, Mircea Horia TIEREAN

Abstract: This paper addresses to the co-axial laser cladding of Metco 15E powder on medium carbon steel. The study

aims to determine the laser power influence on the geometrical profile of the cladded tracks. Seven tests are made with

constant increase of the power density and maintaining the same speed and powder feed rate. Cracks and pore free

single tracks were fabricated. Very low dilution was obtained at all samples by using a defocused laser beam. The clad

high, width, melt depth and HAZ is directly influenced by the laser power.

14.USE OF RESPONSE SURFACE METHODOLOGY TO INVESTIGATE THE EFFECT

OF SOME CHEMICAL ELEMENTS ON THE TENSILE STRENGTH OF THIN SHEET

METAL Silvia MIRONEASA, Costel MIRONEASA

Abstract: The chemical composition influences the mechanical properties of the metal thin sheet that will be subject to

plastic deformation. The carbon (C), manganese (Mn) and phosphor (P), are the most important alloying elements of

the metal sheet that influence the tensile strength (Rm) of the thin sheet form temper steel. In the present study, the

optimized proportions of these chemical elements were determined by applying the response surface method to achieve

the maximum tensile strength. Results revealed that the best chemical composition occurs at 0.08% C, 0.5% Mn and

0.028% P. From the experimental results, it was found that the combination of 0.08% C, 0.5% Mn and 0.028% P

significantly increases tensile strength at the value of 369.80 N/mm2



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15.RESEARCH THE WEAR RESISTANCE OF NANOCOMPOSITE COATING

Ti/TiN/TiCN/nc-TiCN:a-C/nc-TiC:a-C/a-C ON 1.2343 STEEL Velko RUPETSOV, Stefan DISHLIEV, Georgi MISHEV, Radomir MAJCHROWSKI, Chavdar

PASHINSKI, Juliana JAVOROVA

Abstract: An increasing of the wear resistance of injection molds leads to improvement in the living resources and

reduction of the production cost. One of used steels for producing of components for injection molds is 1.2343 steel. In

the current paper are presented results for wear resistance investigation of deposited Ti/TiN/TiCN/nc-TiCN:a-

С/ncTiC:a-С/a-С nanocomposite coating on 1.2343 steel. The influence of the load on the wear intensity of the coating

is investigated. The coating is applied on unhardened grinded specimens, hardened grinded specimens and hardened

polished specimens.

16.ANALYSIS OF THE INFLUENCE OF WORKING TEMPERATURE ON STRESS

DISTRIBUTION IN CASE OF PISTON WITH AL2O3 DEPOSITED LAYER Eduard Sebastian BÂRCA, George MAHU, Mihaela Roxana VLADU, Marioara ABRUDEANU, Corneliu

MUNTEANU

Abstract: Given the complex and cyclic stresses that occur in the internal combustion engines piston, it was intended to

determine the state of stress that occurs in the piston and the way the presence of a layer deposited on its head

influences the stress distribution. Another stress that the piston is subjected to is the thermal stress. The piston head is

under intense thermal stress, which may result in uneven thermal deformation. The method used to determine the state

of stress and thermal behavior is the finite element method using Ansys software 13.

17.THE ADHERENCE OF Al2O3 COATINGS DEPOSITED BY ATMOSPHERIC PLASMA

SPRAYING AND PLASMA ELECTROLYTIC OXIDATION ON AN ALUMINUM ALLOY

BASEMATERIAL Geanina Laura PINTILEI, Marioara ABRUDEANU, Corneliu MUNTEANU, Ionuț Vasile CRÎȘMARU,

Mihaela VLADU, Iustin POPA

Abstract: This paper presents a comparison between Al2O3 coatings deposited on an aluminum alloy. The Al2O3 were

deposited by two different methods: atmospheric plasma spray deposition (ASP) and plasma electrolytic oxidation

(PEO). The paper analyzes the adhesion of the deposited coatings on the aluminum alloy base material. The adherence

test was performed using the "scratch" method with UMTR 2M-CTR type tribometer. To assess the surface roughness,

measurements were conducted using Form Talysurf Intra system, manufactured by Taylor Hobson LEICESTER,

ENGLAND. Highlighting and interpretation of the results was done using scanning electron microscopy with a Quanta

200 3D DUAL BEAM electron microscope.

18.OBTAINING HIGH-CARBON COATINGS FROM MARTENSITEAUSTENITIC

STRUCTURE FOR WORK UNDER CONDITIONS OF SLIDING FRICTION WITHOUT

LUBRICANTS V.I. SAVULYAK, V.Y. SHENFELD, S.O. PANASIUK

Abstract: This article considers the influence of liquid weld pool lifetime for receiving carbon coatings from

martensite-austenitic structure. These structures function well under conditions of friction without lubrication. The

influence of the liquid pool was studied using final element analysis.

19.THE PRESENCE OF VELOCITY DISCONTINUITIES IN NANOINDENTATION

TESTS Traian Lucian SEVERIN, Florina Carmen CIORNEI, Marius BĂEȘU, Stelian ALACI, Ionuț Cristian

ROMÂNU

Abstract: Analysing the data obtained from a nanoidentation, it becomes apparent that, contrary to the predictions of

theoretical models existent in the scientific literature, according to which during the whole test, the penetration speed of

the punch must have a continuous variation, the time variation plot of depth penetration presents an angular point,

when reaching the maximum depth. The penetration speed of the punch was determined confirming the presence of the

velocity jumps. The speed of the punch was interpolated with parabolic arcs accurately determining the value of

velocity jump. For a case of bearing steel, the value of the jump is about six times the total variation from the unloading

phase.



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20.THE EFFECT OF EXPERIMENTAL ERRORS FROM HARDNESS TESTS UPON

FORCE-DISPLACEMENT RELATIONSHIP Ștefan BEȘLIU, Traian-Lucian SEVERIN, Stelian ALACI, Florina Carmen CIORNEI

Abstract: The paper considers estimating the effect of indentation and force measuring errors on the contact force-

deformation exponent for the elasto-plastic contact. First, the experimental data obtained when pressing ball bearings

and a conical punch against the plane surfaces of aluminium and steel cylinders. Because of the polygonal aspect of the

hysteretic curves, the experimental data were momentarily overlooked in favour of the experimental data for

determining microhardness with dedicated equipment. The experimental data from the loading period were interpolated

with a power function. It was found that the value of the exponent of force-displacement dependency is very close to the

theoretical value. It was assumed that the values used in estimating the force-displacement were greater than the

experimental ones. With the forces and displacements affected by the imposed errors, the value of force-displacement

exponent was determined again. The effect of the two errors is very strong. So, if the estimation of force and

displacement are obtained with a relative error of 10%, the error for the force-displacement exponent is close to 60%.

21.THE THERMOELECTRIC METHOD OF TEMPERATURE MEASUREMENT OF THE

WELD BEAD Florin TODIRICĂ, Gheorghe GUTT, Sonia AMARIEI, Traian-Lucian SEVERIN

Abstract: In this article we present a method of temperature measurement of a weld bead melting bath using laser

welding with or without filler material. This method can be used for electric or classic welding, with filler material.

According to this method, to measure the temperature of the weld bead, we use electromotive voltage generated by a

thermocouple made between the welding base metal and the weld bead. As we describe the method, we also present

in detail the phases and the succession of operations to achieve the characteristic of calibration of the thermocouple

used to determine the weld bead temperature.

22. EXPERIMENTAL RESULTS ON THE MAGNETO-ABRASIVE FINISHING OF

EXTERNAL CYLINDRICAL SURFACES USING MAGNETO-ABRASIVE POWDERS

MADE FROM WASTE

Marius-Daniel BĂEȘU, Mircea CIOBANU

Abstract: The article aims to present the equipment and experimental data obtained in finishing external cylindrical

surfaces with magneto-abrasive powders made from waste, in different percentages.

SECTION 3. APPLIED MECHANICS. ROOM: B 101, STAGE 2

TOPICS: -Mechanical Engineering; Applied tribology; Maintenance, Reliability, Life Cycle

Session chairs :

Carmen BUJOREANU

Stelian ALACI

21.CHART ANALYTICAL DETERMINATION TORQUE OF GEROTOR HYDRAULIC

MOTOR S. L. Alexiev, E. G. Velev

Abstract: Hydraulic motor are increasingly used in various types of drives. An important feature is the torque. It is

therefore necessary to be able to calculate in advance that torque from the beginning of design of the hydraulic motor.

This article gives a chart analytical methodology for finding this one.

22. SYNTHESIS OF A HINGED FOUR-LINKED MECHANISM BY THE METHOD OF

MAXIMUM SHRUNKEN EVOLUTE PART I: DEFINITION OF THE INITIAL POSITION

OF THE ROCKER Iliya ANDONOV

Abstract: On the basis of the elements of the kinematic and analytic geometry, a mathematical model for synthesis of a

hinged four-link mechanism is composed by combining two advanced methods. In Part I of this article, by the output

centrode method, a limited area of the initial position of the movable centre of the rocker is determined by the

requirement for favourable condition for transmission of the movement.



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23. SYNTHESIS OF A HINGED FOUR-LINKED MECHANISM BY THE METHOD OF

MAXIMUM SHRUNKEN EVOLUTE PART II: DETERMINATION OF THE

MECHANISM DIMENSIONS

Iliya ANDONOV

Abstract: On the basis of the elements of the kinematic and analytic geometry, a mathematical model for synthesis of a

hinged four-link mechanism is composed by combining two advanced methods. In Part II of this article the kinematic

scheme of the mechanism is synthesized by the method of maximum contracted evolute. The derived mathematical

model for synthesis is illustrated by an appropriate example.

24.RESEARCHES FOR THE DEVELOPMENT OF A DEVICE FOR THE

DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6

NUCLEAR REACTOR. FUEL CHANNEL PRESENTATION Gabi ROSCA FARTAT, Constantin POPESCU, Constantin D. STANESCU

Abstract: The aim of this study is to identify the fuel channel components and the reference plans based on which is

made the installation into calandria of CANDU 6 nuclear reactor. The CANDU 6 is a 740 MW pressure tube reactor

designed by Atomic Energy of Canada Limited (AECL) to provide safe and reliable nuclear power. It is an evolution of

the previous CANDU reactor, and it is designed to be licensable internationally by ensuring its compliance with the

latest Canadian nuclear regulations and the fundamental safety principles of the International Atomic Energy Agency

(IAEA) Safety Standards. The CANDU reactor design is based on the experience derived from preceding CANDU

reactors and virtually every design feature of the latest CANDU reactor is identical to, or it is an evolutionary

improvement of, an earlier proven design. The design of the CANDU fuel channel is accordingly the result of

continuing intensive engineering development of its major components. The reactor assembly of the CANDU 6 nuclear

reactor consists of the horizontal, cylindrical, low-pressure calandria and the end shield assembly. This enclosed

assembly contains the heavy water moderator, the 380 fuel channels assemblies and the reactivity mechanisms. The fuel

channels are one of the major distinguishing features of a CANDU reactor and their reliability is crucial to the

performance of the reactor. Each fuel channel consists of four major components: the pressure tube, the calandria tube,

the annulus spacers and the end fittings. Fuel bundles are enclosed in the fuel channels that pass through the calandria

and the end-shield assembly. The fuel channel is designed to ensure a radiation exposure protection of workers and

public, during the reactor operation. The fuel channels are assembled and installed into the calandria vessel at the

reactorsite following installation of the calandria.



NUCLEAR REACTOR. FUEL CHANNEL ASSEMBLY Constantin POPESCU, Gabi Rosca FARTAT, Constantin D. STANESCU

Abstract: The scope of this paper is to obtain the needed information on main steps necessary to assembly the fuel

channel into calandria of CANDU 6 nuclear reactor. The CANDU fuel channel is essentially the same in all CANDU

reactors and it is considered a fundamental building block in the CANDU system and their reliability is crucial to the

reactor performance. The fuel channels have a high importance for the operation of CANDU nuclear reactors because

they allow new refueling while operating at full capacity. The reactor assembly consists of a hollow cylindrical

structure called the calandria assembly, fuel channels and control mechanisms of reactivity. The 380 fuel channels are

composed of pressure tubes, made of zirconium-niobium alloy, located inside the calandria tubes, with two end fittings

mounted, that are connected by the pipes network of the cooling supply feeders. Each CANDU fuel channel consists of

four major components: the pressure tube, the calandria tube, the annulus spacers and the end fittings. The install

operations to a new fuel channel must comply with the described requirements from the specified documents by AECL.

The main installation operations are the roll expansion of the pressure tube ends into the two end fittings, the welding

of the end fittings to the bellows and the installation of the positioning assemblies. Following installation and inspection

of all 380 channels, the feeder pipes of the cooling system are connected to the end fittings. After each operation, the

resulting information must be recorded in the specific registration and verification documents of each component and

each operation. The registration documents, the check documents and the related reports of the fuel channel

installation are part of the processes records of the assembly history of the nuclear reactor. All these documents and

reports will be archived in order to take anytime a sequential picture of each fuel channel. The radiological safety

analyses are made by certified experts for assessment of radiation exposure of workers and public.



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NUCLEAR REACTOR. FUEL CHANNEL DECOMMISSIONING

Gabi Rosca FARTAT, Constantin POPESCU, Constantin D. STANESCU Abstract: Based on the knowledge referring to assembly the fuel channel into calandria of CANDU 6 nuclear reactor,

the purpose of this study is to achieve possible method for decommissioning of the horizontal fuel channels of calandria

vessel. As long as nuclear power plants are reaching their end of lifecycle, the decommissioning of these installations

has become one of the 21st century’s great challenges. Every project may be managed differently, depending on the

country, development policies, financial considerations, and the availability of qualified engineers or specialized

companies to handle such projects. The main objective of decommissioning is to place a facility into such a condition

that there is no unacceptable risk from the decommissioned facility to public health and safety of the environment. The

overall decommissioning strategy is to deliver a timely, cost-effective program while maintaining high standards of

safety, security and environmental radiation protection. If facilities are not decommissioned, they could degrade and

potentially present an environmental radiological hazard in the future. Simply abandoning or leaving a facility after

ceasing operations is not considered to be an acceptable alternative to decommissioning. The decommissioning

activities performed are administrative and technical, and include the preparation, endorsement and approval of

documents, obtaining permits and authorizations, providing financial resources, decontamination, dismantling,

demolition, controlled removal of equipments, components, conventional or hazardous waste demonstrating the

fulfillment of the radiological conditional or unconditional release of the facility and the ground included in the

decommissioning project. Nuclear decommissioning consists in a planning phase and the implementation of all

procedures and operations. The decommissioning of fuel channels represents one of the last operation which is

performed in the nuclear power decommissioning and it is the most important operation in the nuclear reactor

dismantling. The radiological safety analyses should be made by certified experts for protection assessment to radiation

exposure of workers in time of fuel channel dismantling. The dismantling of fuel channels represents the final phase of

nuclear facility decommissioning and refers to the technical operations taken to extract the components from inside of

the nuclear reactor channel. It is a complex process and requires activities such as disassembly decommissioning

device, locking/unlocking the channel closure and the shield plug, pressure tube cutting, extracting of each component

from the channel, as well as radioactive waste management. The dismantling operation stages of the fuel channel

components should be repeated for each of all 380 channels of the reactor, starting from the front of calandria side and

continuing with the rear side. The final aim of decommissioning is to recover the geographic site to its original

condition.



NUCLEAR REACTOR. DECOMMISSIONING DEVICE PRESENTATION Gabi Rosca FARTAT, Constantin POPESCU, Constantin D. STANESCU

Abstract: The objective of this paper is to present a possible solution for the designing of a device for the

decommissioning of the horizontal fuel channels in the CANDU 6 nuclear reactor. The decommissioning activities are

dismantling, demolition, controlled removal of equipment, components, conventional or hazardous waste (radioactive,

toxic) in compliance with the international basic safety standards on radiation protection. One as the most important

operation in the final phase of the nuclear reactor dismantling is the decommissioning of fuel channels. For the fuel

channels decommissioning should be taken into account the detailed description of the fuel channel and its components,

the installation documents history, adequate radiological criteria for decommissioning guidance, safety and

environmental impact assessment, including radiological and non-radiological analysis of the risks that can occur for

workers, public and environment, the description of the proposed program for decommissioning the fuel channel and its

components, the description of the quality assurance program and of the monitoring program, the equipments and

methods used to verify the compliance with the decommissioning criteria, the planning of performing the final

radiological assessment at the end of the fuel channel decommissioning. These will include also, a description of the

proposed radiation protection procedures to be used during decommissioning. The dismantling of the fuel channel is

performed by one device which shall provide radiation protection during the stages of decommissioning, ensuring

radiation protection of the workers. The device shall be designed according to the radiation protection procedures. The

decommissioning device assembly of the fuel channel components is composed of the device itself and moving platform

support for coupling of the selected channel to be dismantled. The fuel channel decommissioning device is an

autonomous device designed for dismantling and extraction of the channel closure plug and shield plug, extraction of

the end fitting, cutting and extraction of the pressure tube. The fuel channel decommissioning device consists of

following major components: coupling and locking fuel channel module, assembly valve for access to the fuel channel,

storage tubes assembly for extracted components, handling elements assembly, cutting and extraction device and

housing device. The design of the device and platform support is achieved according to the particular features of the

fuel channel components to be dismantled in the program of nuclear reactor decommissioning according to all the

safety aspects and environmental protection during the activities, resulting from the decommissioning plan developed.



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NUCLEAR REACTOR. CUTTING AND EXTRACTING DEVICE PRESENTATION Constantin POPESCU, Gabi Rosca FARTAT, Constantin D. STANESCU

Abstract: This paper present a constructive solution proposed by the authors in order to achieve of a cutting and

extracting device for the decommissioning of the horizontal fuel channels in the CANDU 6 nuclear reactor. One of the

most important part of the decommissioning device is the Cutting and Extraction Device (CED) which perform the

dismantling, cutting and extraction of the fuel channel components. This flexible and modular device is designed to

work inside the fuel channel. The main operations performed by the Cutting and Extraction Device (CED) are

dismantling and extraction of the channel closure plug and shield plug, cutting and extraction of the pressure tube. The

Cutting and Extraction Device (CED) consists of following modules: guiding-fixing module, traction modules, cutting

module, guiding-extracting module and articulated elements for modules connecting. The guiding-fixing module is

equipped with elastic guiding rollers and fixing claws in working position, the traction modules are provided with

variable pitch rollers for allowing travel speed change through the fuel channel. The cutting module is positioned in the

middle of the device and it is equipped with three roll knives for pressure tube cutting, having a system for cutting place

video surveillance and pyrometers for cutting place monitoring temperature. The operations performed by the Cutting

and Extraction Device (CED) of fuel channel are as follows: unblock and extract the channel closure plug, unblock and

extract the channel shield plug, block and cut the middle of the pressure tube, block and cut the end of the pressure

tube, block and extract the half of pressure tube. The Cutting and Extraction Device (CED) is fully automated,

connected by wires to a Programmable Logic Controller (PLC) and controlled from a Human Machine Interface

(HMI). The design of the Cutting and Extraction Device (CED) shall be achieved according to the particular features of

the fuel channel components to be dismantled and to ensure radiation protection of workers.

29. THERMAL SHOCK ANALYSIS USING THE FINITE ELEMENT METHOD FOR A

GIVEN SPECIMEN Alina-Elena BUȘARU, Mariana GORAN, Gabriel Marius DUMITRU

Abstract: To perform a thermal transitional analysis it was necessary to use ANSYS 14.0, commercial programed for

modeling with finite element. For this analysis it was used an OLC 45 sample. Using a plasma jet spraying process one

of the samples sides was metal-faced. This analysis follows the idea of temperature distribution alloy with the other

characteristics that defines the thermal state in object: the heat quantities released or absorbed thermal gradient,

thermal flow. This analysis is followed by a stress analysis to determine the causes of the thermal expansion or

contractions. For this process it was used Zr3O2 material stabilized with Y2O3.

30. DYNAMIC CONSEQUENCES OF UNPARALLELISM OF AXES IN MECHANISMS

WITH OSCILLATING FOLLOWER Stelian ALACI, Florina Carmen CIORNEI

Abstract: The paper illustrates that in the case of a mechanism with oscillating follower, not ensuring the parallelism

between the cam and follower axes conducts to occurrence of shocks during mechanism’ s operation. The source of

these shocks, in the case of unparallelism between the two axes, is the abrupt removal of contact point on the

intersection curves between the lateral surfaces and the active surface of the cam. Using a fictive mechanism where the

driving element is a shaft with three cams with suitable selected profiles, it is confirmed that at the transition of contact

point from one curve to another, a shock is produced

31. EFFECT OF CENTRIFUGAL FORCE AND GEOMETRY UPON DYNAMICAL

BEHAVIOUR OF ROTATING CAMS Florina Carmen CIORNEI, Stelian ALACI, Dumitru AMARANDEI

Abstract: The paper studies the effect of geometry and centrifugal force upon the stress state and strain state in a

circular rotating cam. There are considered two cams of different thicknesses. For an uniform rotation velocity of the

cam, the equivalent von Mises stress is much lower than the yield stress and thus the risk of plastic deformation

occurrence is avoided. Concerning the strains, they are grater for the thicker cam and there is the possibility that the

deformations exceed the limit allowed by the deviation from the nominal profile. For the same supports scheme, the

vibration modes are found. For the first vibration mode, the von Mises stress values exceed substantially the yield stress

of the cam’s material. Complementary, for the fundamental vibration mode, the displacements of the points from the

cam’s periphery are parallel to the shaft axis and thus the profile of the cam is unaltered.



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32. UPON INTERPOLATION OF CONTACT TESTS EXPERIMENTAL DATA FROM

DYNAMICAL SYSTEMS Florina Carmen CIORNEI, Stelian ALACI, Stefan BESLIU

Abstract: For soft metallic materials subjected to contact, the loading curve of hysteresis loop presents a concavity

shift. Following this notice, an interpolation function is proposed. The proposed form of interpolation function has the

advantage that, expressing experimental data by logarithmic coordinates, the constants occurring in the function can be

found analytically and thus an initial solution is not required, as in the case of numerical modelling. The experimental

records were obtained from hardness tests performed using three punch geometries, spherical, cylindrical and conical,

on spruce probes. The data were interpolated with the proposed function and with the generally used power functions.

Both from plots and from squared deviations comparison it is attested that the proposed function accomplishes a much

better interpolation.

33. PROPOSED METHOD FOR UNDERCUTTING FPHENOMENON IDENTIFICATION

IN CAM MECHANISMS Stelian ALACI, Florina Carmen CIORNEI, Dumitru AMARANDEI

Abstract: The undercutting phenomenon is an unwanted incident occurring when the profile of a part is obtained as

envelope of successive positions of a moving curve. It is present in the cases of cam profiles and toothed gears and, in

general, in the case of cam mechanism, the occurrence is identified in the final stage of designing method. The present

paper shows a manner of undercutting phenomenon detection when the law of motion and the constructive parameters

of the mechanism are known.

34. CORRELATION MODELS FOR PULVERIZED FUEL JET ANGLE TO INTERNAL

COMBUSTION ENGINES Marius Constantin BENIUGA, Ioan MIHAI

Abstract: The paper presents models for fuel spray angle spray nozzle injector. Since fuel nozzles wear while changing

its diameter, it was considered appropriate to make an analysis of the behavior of fuel through nozzles with different

dimensional values. The study changing the total angle of jet fuel based on certain parameters such as the diameter of

the spray nozzle, outlet fuel injection pressure liquid, and so on. They analyze the factors that contribute to the

development of jet fuel and influencing the fuel mixture formation and combustion quality. To date, the majority of

internal combustion engines using indirect injection of fuel, and correlations developed models of specific sizes of the

main fuel jet sprayed by direct numerical simulation. The graphs obtained knowledge helps in burning and ultimately

help reduce pollutants in the flue gas components. Adequate modeling of the injection process helps to increase energy

efficiency, fuel atomization process is still unclear total. For these reasons, the article presents an overview of existing

models and propose some ways of improvement.

35. STUDY ON LENGTH OF THE UNDISTURBED LIQUID JET IN THE ATOMIZATION

PROCESE Marius Constantin BENIUGA, Ioan MIHAI

Abstract: This paper aims to study factors and phenomena that lead to the development of jet atomization spray a jet of

air, as encountered in the operation process of internal combustion engines using fuel injection. The correlation study

based on the undistorted length of the liquid jet spray nozzle orifice diameter of the liquid fuel, the temperature and

pressure surrounding the liquid spray. After determining the parameters analytically and experimental practice their

optimization is achieved through tests on test benches. Using bad spraying huge financial implications through

increased fuel consumption and failure indices of quality products aimed hazards. These considerations justify the

development of efficient models for practical application of fuel atomization. This can only be achieved by assisting

computerized injection systems for engine operation.

36. THE MODELING OF THE SPEED, OF THE FRICTION COEFFICIENT AND THE

CAPILLARY PRESSURE IN THE HEAT CONVECTIVE TRANSFER THROUGH

POROUS MEDIA Siviu SPRINCEANA, Ioan MIHAI

Abstract: In case of heat transfer and mass transfer through flat thermal micro-pipes with excess of liquid, it is

compulsory an analysis of the porosity grade of the capillary layers which are a part of their construction. The

theoretical analysis is focused on two directions. The first one aims the blend between vapors and liquid, which move

through porous media, made from copper and polysynthetic materials. The second direction aims the influence of the

porous media over the movement speed and on the study of the friction coefficients which appear between them and the

media which they cross. The variation of the thermal flux applied to the flat thermal micro-pipe has as the result the

modification of the inner capillary pressure and, implicit, the modification of the speed and the friction coefficients of

the liquid and the vapors in their movement through porous capillary media.



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37. A STUDY ON DAMPING CAPACITY OF ALUMINIUM-BASED METALLIC FOAM Oana BALȚATESCU, Daniela CHICET, Mihai AXINTE, Carmen BUJOREANU

Abstract: Metallic foams (referred in literature as metfoams), represent a relative new category of materials, yet

unknown to the large engineering world. They present new physical, mechanical, thermal, electrical and acoustic

properties and they are material with low densities. Hence, they offer potential for lightweight structures, for

mechanical and/or thermal energy absorption, most of foams having a low production cost. Nowadays, metallic foams

are incompletely characterised and the production processes are still in the stabilization stage, thus resulting some

properties variations. At this point of time, the most commercially available foams are produced from aluminium and

nickel alloys. In the present paper it was investigated the damping capacity of an aluminium-based metallic foam,

manufactured by the procedure of melting the alloy onto a salt bed.

38. THE CONVECTIVE THERMAL TRANSFER ANALYSIS AT THE FLAT THERMAL

MICRO-PIPES THROUGH CRANK-NICOLSON METHOD Siviu SPRINCEANA, Ioan MIHAI

Abstract: Flat thermal micro-pipes, unlike thermal pipes, have restricted areas of utilization, those being utilized at

those systems which ensure the quick cooling of the components at which it is necessary to dissipate the heat when the

specific flux exceeds a couple of hundreds of W/m2. In this article it is wanted to analyze how does the heat transfer go

which is realized through flat thermal micro-pipes through Crank-Nicolson method when an end of the pipe is heated

and the other one is washed with a jet of cold air. The finite element method will reduce the problem of the transitory

heat transfer at a set of first order differential equations. These equations describe the process of heat transfer as being

linear in limit conditions whereby the physical and thermal proprieties are invariable during the time. In this way, it

will be developed the differential equations which describe the heat transport phenomenon, the mass transfer

phenomenon ant the moment of the thermal transfer. After the establishing of the initial parameters and the frontier

ones, it will be developed an application in Matlab which will highlight the thermal transfer on the whole length of the

flat thermal micro-pipe.

39.TECHNIQUE OF MOTOR VEHICLE INDICES CALCULATION WHILE

TRANSITION OF ITS ENGINE FOR OPERATION AT THE MIXTURE OF DIESEL AND

BIODIESEL FUELS A. P. Poliakov, О. О. Galushchak, D. О. Galushchak

Abstract: The paper considers the technique of calculation of technical, economical and ecological indices of the

engine and motor vehicle on the whole in the process of usage of engine supply system with dynamic regulation of

percentage composition of diesel and biodiesel fuels in the mixture. Values of fuel mixture burning duration depending

on its temperature, percentage composition and cyclic fuel supply are given.

40.EXPERIMENTAL METHOD USED TO DETERMINE MOONEY -- RIVLIN

CONSTANTS FOR RUBBER. PART I Ionuț Cristian ROMÂNU

Abstract: The present paper describes a new experimental method used to determine stress strain correlation for

cylindrical rubber specimens. Three rubber samples with 3.4 mm diameters were used. In order to obtain a single axis

stress state, the length-diameter ratio of the samples was taken larger than 10. The loading force was measured by aid

of resistive transducers and strain was determined with a laser profilometer.

41.EXPERIMENTAL METHOD USED TO DETERMINE MOONEY--RIVLIN

CONSTANTS FOR RUBBER. PART II Ionuț Cristian ROMÂNU

Abstract: This paper presents some experimental results obtained for rubber stress-strain correlation. Three

cylindrical rubber specimens with 1.7 mm radius were used. The specimens were subjected to uniaxial tensile testing.

The material was considered incompressible, homogenous and isotropic. The experimental results were used to

determine Mooney-Rivlin constants. The employed experimental method was first described in [1]. The experimentally

obtained Mooney Rivlin constants were used to describe rubber behavior in Femap software. A contact between a 12.6

mm rubber sphere and a rigid flat plate was modeled. The finite element analysis results were compared to those

obtained experimentally.



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SECTION 4. ENVIRONMENTAL AND QUALITY MANAGEMENT. ROOM: B 102, STAGE 2

TOPICS: Engineering Management and Leadership; Innovation, Creativity and Industrial Development; Quality

Management; Environmental Engineering and Sustainable Development; Learning and Education in Engineering

Session chairs :

Nicolae IONESCU

Mircea CIOBANU

Costel MIRONEASA

13. THE INFLUENCE OF HYDROTECHNICAL STRUCTURES ON THE MINOR

RIVERBED MORPHOLOGY OF THE DANUBE, IN THE BALA BRANCH - OLD

DANUBE BIFURCATION AREA Alina-Florina NICOLAE, Puiu Lucian GEORGESCU, Constantin Marius RAISCHI, Alexandru

PETRESCU, Madalina Georgiana BOBOC

Abstract: The morphological and hydrological phenomena that occurred in the Bala Branch - Old Danube bifurcation

area led to the worsening of navigation conditions on Danube. Thus, it was necessary the execution of hydrotechnical

structures allowing the navigation to be unfolded under optimum conditions on the Old Danube branch, throughout the

year. In the present paper is analyzed the morphological dynamics of the Danube’s minor riverbed in the mentioned

area, taking into consideration the evolution of anthropogenic interventions. This analysis is based on the informational

volume obtained after bathymetric, flow and velocity measurements, in the periods of preconstruction and construction

of the hydrotechnical works. This study is of significant importance in achieving the correlation between the execution

dynamics of hydrotechnical works and the optimization of navigation conditions as recommended by the Danube

Commission, in accordance with environmental parameters.

14. TOOL FOR MANAGING PROCESSES WITHIN ORGANIZATIONS Alexandru POTORAC, Marius-Daniel BĂEȘU, Costică STOLERU

Abstract: Any modern organization is characterized by a series of processes that must be constantly monitored, kept

under control and improved. Implementation of a system of integrated environmental and quality management is a

complex activity that leads ultimately to streamline all processes and activities in the respective organization but which

involves a considerable effort on its part. Often, the volume of work needed to implement such a system is doubled by

the disadvantage to develop a complex and voluminous documentation which is, for these reasons, difficult to be quickly

accessed by the senior management in order to monitor processes in real time and to make the appropriate decisions. In

order to remove this disadvantage, an Excel program that enables a simple documentation which meets the

requirements of ISO 9001 standards, with a minimum of paper, easy access and use, was developed.

15. EVALUTION OF THE POLLUTION DEGREE OF WASTEWATER FROM OIL

MILLS IN ROMANIA Elena SCUTELNICU (PĂUN), Constantin D. STANESCU, Mariana PATRASCU (ANTONESCU)

Abstract: This paper presents the evaluation of the degree of pollution of wastewater from oil mills and margarine in

Romania. Preliminary experimental researches were conducted on polymer flocculent material obtained by irradiation

with accelerated electrons, type PA (AMD -AA -40), copolymers of acrylamide and acrylic acid, used alone or in

combination with classical electrolytes in difficult waters, in relation to the effectiveness of the treatment of classical

chemical agents, such as ferrous sulphate, aluminum and lime.

16.SOME ASPECTS RELATED TO RISK ASSESSMENT AND EMERGENCY

PREPAREDNESS AS BASIC COMPONENTS OF ENVIRONMENTAL MANAGEMENT

SYSTEMS (EMS) AUDIT Elena Cristina JUGANARU, Emil MILITARU, Sergiu TONOIU

Abstract: This paper offers an overview of the main factors involved in the process of risk assessment and emergency

preparedness. In this context, the authors present some specific aspects of human resources training on emergency

situations and recommend a series of questions and requirements regarding emergency situations for the certification

audit of the environmental management system (EMS).



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17. PERFORMANCE MEASUREMENT IN SMES Mirela NASTASIEA

Abstract: Manufacturers in many industries face worldwide competitive pressures. These manufacturers must provide

high-quality products with leading-edge performance capabilities to survive, much less prosper. There is intense

pressure to produce high - performance at minimum-costs. The customer is the principal judge of quality. Perceptions

of value and satisfaction are influenced by many factors throughout the customer's overall purchase, ownership, and

service experiences. To accomplish this task, an organization's efforts need to extend well beyond merely meeting

specifications, reducing defects and errors, or resolving complaints. They must include both designing new products

that truly delight the customer and responding rapidly to changing consumer and market demands. An organization

that is close to its customer knows what the customer wants, how the customer uses its products, and anticipates needs

that the customer may not even be able to express. It also continually develops new ways of enhancing customer

relationships. The companies must use performance management and measurement systems derived from their

strategies and capabilities (Kaplan and Norton, 1992). Performance measures should be linked to an organization's

strategy in order to provide useful information for making effective decisions and shaping desirable employee behavior.

18.HEAVY METAL REMOVAL FROM A MULTI-METAL WASTEWATER BY

PUROLITE S930 CHELATING RESIN Petru BULAI, Elena-Raluca BULAI

Abstract: The paper presents the equilibrium studies of the copper ions retaining process from waste water containing

both copper ions and iron ions. Chelating resin Purolite S930 was used as a sorbent for retaining the ions of copper.

Copper ion retaining process by Chelating resin Purolite S930 was influenced by the presence of iron ions. Although

Purolite S930 resin is a very good sorbent for retention of copper ions from waste water, the equilibrium of sorption

process was significantly influenced by wastewater ionic strength, by concentration and concentration ratio of ions

present in wastewater. The retention of copper ions decreases with the increasing of ionic water strength, with

concentrations increasing and with increasing of ratio concentrations of ions present in wastewater.

19. REMOVAL OF COPPER (II) IONS FROM WASTEWATER CONTAINING THE SALT

OF ETHYLENEDIAMINETETRAACETIC ACID (EDTA): KINETIC STUDIES Petru BULAI, Elena-Raluca BULAI

Abstract: The copper ions are hazardous to the environment when they are present at excessive levels in wastewaters.

Sorption is a process widely used in retaining heavy metal ions wastewater such as copper ions. The presence of a

chelated organic substances in the wastewater has a major negative impact on the process of sorption. The work

presents the sorption process of copper ions from wastewater containing EDTA, on Purolite S930 resin.

1930 – CONFERENCE DINNER

SATURDAY, MAY, 9th, 2015

0900 – 1100 SHARING IDEAS ABOUT THE FUTURE OF TECHNOLOGIES IN MACHINE

MANUFACTURING AND INTEGRATED SYSTEMS OF PRODUCTION

1115 – 1730 HALF DAY TOUR OF SUCEAVA COUNTY: VORONET MONASTERY, CACICA

SALT MINE AND BASILICA MINOR, THE POLISH CATHOLIC CHURCH OF CACICA

http://www.romaniaphotos.ro/2011/01/salt-mine-from-cacica.html

FRIDAY, MAY, 8th ,2015 - fim.usv.ro · The results show that vibration analysis is a promising tool...

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