FEA for Thermoplastics
FEA for Thermoplastics
(OP)
Hi,
Has anyone any good introductory references for FEA of Thermoplastics. I'm familiar with standard linear FEA and contact analysis but not so much so for non-linear.
My current problem is the analysis of an assembly of parts made from a glass reinforced, carbon fiber nylon dupont resin. (Zytel CDV805 BK409)
I saw this eseminar from Aug 2006 and was wondering if anyone had seen it or knew whether an copy was available?
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Cheers,
Rich
Has anyone any good introductory references for FEA of Thermoplastics. I'm familiar with standard linear FEA and contact analysis but not so much so for non-linear.
My current problem is the analysis of an assembly of parts made from a glass reinforced, carbon fiber nylon dupont resin. (Zytel CDV805 BK409)
I saw this eseminar from Aug 2006 and was wondering if anyone had seen it or knew whether an copy was available?
h
Cheers,
Rich





RE: FEA for Thermoplastics
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Regards
Gert
RE: FEA for Thermoplastics
RE: FEA for Thermoplastics
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: FEA for Thermoplastics
As you said, whilst I'm vaguely familiar with the requirements for modelling thermoplastics, most of my fea work to date (note - not a regular part of my work) has been with homogeneous materials.
To some degree it's one of those areas that I want to learn more about so I can converse with those with greater expertise, and therefore be in a better position to judge outsourced work...
Rich
RE: FEA for Thermoplastics
A book I have found useful is:
"Structural Analysis Of Thermoplastic Components", by Gerry Trantina and Ron Nimmer, McGraw-Hill, Inc. 1994.
ISBN 0-07-065202-3. It is currently in stock at Amazon.com and at Barnes and Noble.
Jerzy
RE: FEA for Thermoplastics
Oh, yeah, and the endless testing that you have to do to get the proper physical properties and potential failure modes. Matching that to your analysis techniques...etc. etc. etc.
Most of the failure analysis methods out there today fall short in at least a mode or two (they are willing to admit that...not my assessment). Spend a great deal of time thinking in terms of "strain" (most of us have been taught to think in terms of "stress"). We don't have a great feel for failure stress in composites because it depends on specific materials used, fiber orientation...generally requires a GREAT amount of testing with VERY specific witness coupons.
It's a fun field to be in...ENJOY!
Garland
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: FEA for Thermoplastics
The main difference is the behavior of the material.
The law can be a viscoelastic or viscoplastic law in case of a glass-fiber-reinforced polyamide.
The behavior depends on the loading (effect of temperature and strain rate).
You have to choose a behavior law in the materials library of your FEA software, a strain measure and to apply the loading step by step to follow the nonlinear material law (even if it's a static analysis).
One difficulty is to find the properties of the polyamide.
You can begin with a elastic linear law to check your model.
Regards,
Torpen.