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Professor Jonghwan SuhrProfessor Jae-Do Nam
Sungkyunkwan University (SKKU)
International Forum on Open Innovation 2018
2018/5/25
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SKKU 3D Printing Hive Center (since 2015)
R&D, Education, Consulting, Networking, Design & Printing Service, New Business Dev.
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Cross-Interdisciplinary R&ED Infrastructure
Structuralcomposites EMIshieldmaterials Thixotropicmaterials Flexibleelectronics
EHDprinting Nozzlesystem PrintingS/W
Reverse-engineering Processsimulation Optimum design
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Researchinstitute
Company
Localgovernment
University
SKKU3D Printing
HIVE
LG Electronics
2nd Research ComplexRm#83158 (300m2)
Best Location for Close Collaborations with Industries !
Location!
Gyoenggi Province
Automobile, IT, NT, BT industries within 30km
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2018.03.29
Collaborations on materials & systems of metal 3D printing Joint R&D projects Exchange visits, training and talent cultivation
SKKU-SITI Metal 3D Printing Joint Research Center
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SKKU-Chiang Mai University
2016. 10. 18
Collaborations on Environmentally Friendly 3D Printing Materials Joint Lab in Step Science Park Exchange visits/Share experties
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2016. 07. 28.
SKKU-Dassault Systemes
Dassault Systems Providing famous & useful Engineering software (SIMULIA, CATIA, ABAQUS, etc.) Plan the joint project for 3D Printing materials in polymer & metal materials Technical information exchange & workshop Joint Publications: Conference and journal papers
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Development of EMI shielding composites
Development of high resolution 3D printing system
Rheology controlprinting system
Thixotropy controlprinting system
Before After
Shield effectiveness analysis
Smart Phone with EMI Shielding
3D Printing for Smart Phone Applications
Development of thixotropic material
Mechanical properties analysis
Thixotropy control
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* Kelly-Tyson model equation
Mechanical properties characterization
Composite fiber length measurement
Composite design & critical fiber length
* Rule of mixture
Critical length (um) 743.97
3D Printable Composite Filament Design
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Line width & height control
Rheological properties control
Mechanical property control
3D Printing for Fuel Cell Electric Vehicle
Customized 3D printable Ink development(PI, Epoxy, etc.)
3D Printable Materials/Hardware & Structural Design
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3D Printing Consulting for Hyundai Motors
Battery coverMaterial: NylonPrinter type: SLS
Front bumperMaterial: ResinPrinter type: Industrial SLS
Air conditioning ductMaterial: NylonPrinter type: SLS
Suspension wishboneMaterial: NylonPrinter type: DMLS
Head light prototypeMaterial: ResinPrinter type: SLA
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3D Printing for Nuclear Power Plant
“Equipment obsolescence”“Part Aging”
Reverse-engineering
3D printing simulation& parameter optimization
Reliability verification* Neutron irradiation test
Standardization
* DED (Direct Energy Deposition)MX-1000, 1,000/800/650 (mm)
* PBF (Powder Bed Fusion)SLM 500, 500/280/365 (mm)
Metal 3D Printing
Period: 2017~2022Budget: $13 million
“Metal 3D printing for nuclear power plant parts"
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3D scan datageneration
Reverse-engineering
3D printing & 3D scanning
Drawing
* Inventor
3D CAD model generation
* Artec spiderRes.: 0.1 mm
* Polyjet 3D printerConnex350, Stratasys Co.
Target part: 3 inch control valve bodyPart size: 500/300/300 (mm)
3D Printing for Nuclear Power Plant
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Printing process simulation
Max. distortioncomparison
Material model development Printing process analysis
Laser power
Laser speed
Laser spot size
Laser pathProcess
Horizontal printing Vertical printing
Max. effectivestress
(N/mm2)
Max.distortio
n(mm)
Max. effectivestress
(N/mm2)
Max.distortion
(mm)
After printing 462.75 0.55 448.63 0.45
Simple cutting 370.93 0.61 395.12 0.42
Support removal
327.32 0.94 299.87 0.57
Vertical printinganalysis
Horizontal printinganalysis
3D Printing for Nuclear Power Plant
3D printing analysis
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Intermolecular networkby hydrogen-bond
High Speed & Resolution with Thixotropy
* H. Sun, et al. J. of Mater. Chem. C, (2018)
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Curing Characteristics & Anisotropic Properties
<Connex 350>
<Curing degree vs Irradiation time>
<Uniaxial Tensile Test>
0.0 0.2 0.4 0.6 0.8 1.0
260
270
280
290
300
310
320
330
340
DPC and DSC results
Printed Specimen
DiBenedetto Fitting
Gla
ss T
ran
sitio
n T
em
pe
ratu
re (
K)
Degree of cure (α)
Mechanical Analysis
<DSC & DPC>
<Dibenedetto analysis>
<Size dependently increasing tensile properties>
UV-Curable 3D Printing Materials
Experimental
<Electron Beam Treatment>
* S.Y. Hong, et al. Polymer (2018)
Thermal Analysis
Electron Beam Treatment
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with
“Technical support of 3D printed temporal bone prototype”
Temporal bonemodel request
Optimal material &3DP process derivation
SKKU3D Printing
HIVE
3D Printing for Biomedical Applications
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Beginner Course K-12
Advanced/Customized Courses
Education & Training Programs
Capstone Design for Undergrads
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Education - R&E Program w/ Local High School for Gifted
Pre-mixing by mini extruder
Composite filament manufacturing
3D printing & material properties measurements
Electrical conductivity Tensile property
“ Development of CNT-PLAf composite filament for FDM”
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