cad/cam/cae tools for virtual prototyping.mmateng.eu/download/documents/presentations/2016-10... ·...
TRANSCRIPT
CAD/CAM/CAE tools
for virtual prototyping.
Dr ing. Peter Arras
KU Leuven – technology campus De Nayer
2Lviv 20 October 2016
• Modern computer aided techniques changed the world
of design towards a world in which virtual prototypes
can be used to check and improve the design. These
design methods aim to eliminate the use of many
physical prototypes.
• In a short overview we will explore the different
techniques and see how they can be used in teaching
engineering students .
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Engineering design: the design triangle.
Design
MaterialsManufacturing
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History of design.
• Drawing is method of communication.
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Drawing containing a lot of information:• Calculate
• Manufacture
• Document
• …..
> many documents,
many possible errors
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• Drawing oriented:
o Paper model
o Only on paper
o Multiplication of data
• Model oriented:
o CAD-model
o Virtual prototype
o 1 source of data
From drawing oriented to model oriented
design.
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Model
oriented.
virtual prototype:
CAD model
production: CAMdocumentation:
drawings
BOM
...
numerical simulations:
structural
thermal
electrical
mechanism analysis
geometry checks
tolerance analysis
visual represen-
tation
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Virtual prototype.
virtual prototype:
CAD Model
geometry
appearance
physical and
mechanical properties
dynamic behavior
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Virtual prototyping: aims.• Use a electronic model to
test and predict behavior
• Increase knowledge on the
design
• Limit the number of physical
prototypes
• Limit the costs
• Limit the efforts
• Shorten the time to
production/market
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Product design: Virtual testing.
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Product design: “Insight driven engineering”
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MCAD (Mechanical CAD):
Model oriented.
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MCAD (Mechanical CAD):
CREO/ProEngineer
• No compromise on design
• From simple to complex design
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Cable harness: cabling.
• Geometry: lengths,
electrical logic: paths,
connections
Wire, cable, bundle
Entry ports,
connections
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Cabling: interfacing hardware
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Framework extension:
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FEA (Finite Element Analysis)
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Demands:
Strength?
stress
strain
Fatigue
Buckling
Tempera-ture
Resonance
Contact-stress
Strain -energy
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Strain energy.
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Intolerable deformation/plasticity.
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Fatigue
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Fatigue and stress-concentrations
• Alexander Kielland oilrig.
22
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Buckling.
23
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Resonance.
• Tacoma Narrows bridge.
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Contact stress.
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Temperature
• Bimetal
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CFD: Computational Fluid Dynamics*.
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Manufacturing.
• Creating toolpaths
• Simulation
• First-time right
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MCAD:
fundamentals
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Parametric: dimensions drive the design
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Associative
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Some student examples:
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Air compressor
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Case study: car jack.
• Aim: make a car jack, able to lift the car.
o Force to operate not too big
o Light weight (cost, maneuverability)
o Strong enough to withstand operation
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Design parts
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Make assembly
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Make mechanism
• Include:
o Motors
o Measures
o Conditions
o …
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Mechanism analysis.
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Strength analysis
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Make documentation
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Questions?