Design the Difference - Mesap · Altair Topology Optimization is OptiStruct Altair is the premier...
Transcript of Design the Difference - Mesap · Altair Topology Optimization is OptiStruct Altair is the premier...
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Design the DifferenceLiberare il potenziale dell'Additive Manufacturing con nuove
tecniche di progettazione
Ing. Giulio Turinetti 25 September 2017
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© 2017 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.
Altair Numbers
Founded1985Headquarted in Troy, MI US
48 offices in 22 countries
$323M2016 Billings
50+ISV partners under our unique,
patented licensing model
2500+Engineers, scientists and creative thinkers
5000+Customer Installations globally
60,000+Users
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Our Vision
To radically change the way organizations
design products and
make decisions
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Automotive Aerospace Heavy Equipment Government
Life/Earth Sciences Energy ArchitectureElectronics/Consumer Goods
5,000 customers installations worldwide
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Altair Solver Technology
Multiphysics Simulation and Optimization
Structural
Analysis
Manufacturing
Simulation
Systems
SimulationFluid
Dynamics
Thermal
Analysis
Crash, Safety,
Impact & Blast
Electro-
Magnetics
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Mechanical
OptiStruct: Strength, Stiffness, Durability OptiStruct: Vibrations, Acoustics
RADIOSS: Crashworthiness, Impact, Blast MotionSolve: Mechanical Systems
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Fluid flow and Thermal
ultraFluidX: Aerodynamics AcuSolve: Thermal Analysis
AcuSolve: Tank Filling nanoFluidX: Gear and Engine Oiling
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Flux FEKO
Electromagnetics
Electro-magnetic Spectrum Flux: Motors, Transformers
FEKO: Antennas, EMC WinProp: Wave Propagation
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Fluid-Multi-body
Multi-Physics
Electromagnetic-Thermal
Thermal-Structure Fluid-Structure
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ALM Process
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Main elements of ALM Technology
Metallic PowdersAM Machines
Design for Additive Manufacturing
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How to get benefits
Slow Process
Very expensive Powders
Massive parts have huge distorsion
Huge ratio between material and void
Complexity is for free
Lattice is allowed
Mass reduction has a
big impact on the
whole result
To get most benefit we
need to think complex
shapes
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Shape the Inspiration
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How can a designer come up with the
best possible shape?
The Additive Manufacturing Design Challenge
picture by courtesy of Laser Zentrum Nord
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Topology Optimization
Density = 1
Density = 0
Given the package space and loading conditions for a
design problem, optimization quickly generates the
ideal shape.
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Concept Design Validation Production
Never too soon to optimize
ConceptDesign + CAE
Validation Production
Concept
Inspire
Design
CAEValidation Production
Weight saving
Time saving
Cost saving
Δ
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Altair Topology Optimization is OptiStruct
Altair is the premier provider of design optimization software, driving design processes of
leading manufacturers for over 20 years
Not just an exercise
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Make the design Manufacturable
Suitable for Casting - ALM Suitable for Milling, Stamping
Same Performaces
• Stress
• Stiffness
• Mass…
Introducing Manufacturing constraints the
final desing has more doable shape for that
manufacturing technology,
But with the
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Shape the Inspiration
Model Preparation
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Shape the Inspiration
Conceptual Optimization
Model Preparation
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
Validation
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
ValidationConcept
Modification
Stamping
Extrusion
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
ValidationConcept
ModificationCompare Results
Extrusion
ALM
Stamping
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
ValidationConcept
ModificationCompare Results
Concept Interpretation
CAD
How to sketch such a complex part?
Too Complex Organic shape
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
ValidationConcept
ModificationCompare Results
Concept Interpretation
CAD
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Shape the Inspiration
Conceptual Optimization
Model PreparationConcept
ValidationConcept
ModificationCompare Results
Concept Interpretation
CADFinal CAD
Advance geometry recontruction via full PolyNurbs technology and many more
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Process Exploration
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How to consider the NEW Manufacturing Constraints?
Types of support
Downward facing surfaces
Angled surfaces and holes
Is the ALM technology Limitless?
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Overhang angle Constraint
Minimise Support Structure by Overhang Angle Control 45° respect to Building Direction
In general supports represent a problem:
• Wasted material
• Time consuming
• Influence the surface finish
• Manual operation
Initial design “Free” No manufacturing constraint
Building
Direction
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Expansion to third party software
Altair’s business model allows for programs such as the Altair Partner Alliance (APA)
Third Party Organizations’ products are included under the Altair licensing for seamless access by customers
No additional costs for customers
92% of customers who have access toAPA have downloaded an APA product
600 companies downloaded a product they’d never tried before just in 2016
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Process Exploration via APA softwares
In ALM process simulation Altair can offer different softwares to manage model recontructionand process simulation.
Fast and advanced
geometry reconstruction
starting from STL
Process simulation
(Meso and Macro scale)
Process simulation
(Macro scale) with
Inherent Strain Approach
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Robust Design
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Fail Safe
• A fail safe design is one that in an event of failure, responds or results in a way that will cause no or minimum harm
• Fail-safe structure must support 80-100% limit loads without catastrophic failure (Airframe structural design by Michael NIU)
Delta airlines flight 1288, the aircraft
suffered an engine explosion however the
rest of the plane remained controllable and
the most passengers survived unharmed.
Not failsafe Failsafe
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Fail Safe Optimization
Setting damage Zones in all the design space
Create several models with
defects.
Each variation has to fits the
topology optimization requests
Final results is the Optimal compromise
amongs all the defected variations
Redundant load-path
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Fail Safe Optimization
Introducing «Defect zones» inside the Design space
Different Load-paths
Redundant members
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Robust Design – Topology Optimization (RBTO)
Due to manufacturing process we introduce a set
of variable parameters like:
• UTS of the material
• Young Modulus
• Orthotropy (before Heat treatment)
We need to switch to deterministic approach to Stochastic approach since the
very beginning as Topology Optimization
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Robust Design – Topology Optimization (RBTO)
Material dispersion create
new load-path to make the
final design Robust
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Robust Design – Validation
Even with the worst scenario
(low material property) the
final design respect all the
mechanical performances
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Lattice Structures
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Lattice structures are natural from Topology results
Void SolidLattice
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Lattice Structure Workflow
Classic ALM redesign process
Define desing Space Topology Results Geometry Interpretation
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How all of this becomes REAL
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3D Printed Antenna Bracket for
Sentinel-1 Satellite:
• 43% weight reduction
(from 1.626 kg to 0.936 kg)
• Increased Eigen frequency
(70Hz 90 Hz)
• Improved static behaviour, strength,
stiffness, stability
From the Printer into Space
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• Comparison of CAD model with physical model through
Computer Tomography.
• Scan resolution of 320 m
Verification
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Design process summary
Design Manufacturing Verification / Testing
• Functional analysis
• Topology optimization
• CAD Interpretation
• Size/Shape optimization
• Detail stress analysis
• Optimization
• Post-Processing
• Samples definition
• Process control
• Quality control
• Test definition
• Qualification testing
• Model correlation
42% Weight save
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Camera bracket – Optimization model and problem definition
• Material: Titanium
• Package Space Defined by Airframe
Compartment
• Non-Design Regions to Accommodate
Fixings
• Loading and Boundary Conditions
Consistent with Baseline
• Lateral
• Longitudinal
• Modal
Objective Minimise Mass
Constraints First Mode Natural Frequency
Longitudinal Displacement
Lateral Displacement
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Design process summary