Scared of anything not linear static
Scared of anything not linear static
(OP)
Here's a general question to all you FEA hotshots who perform non-linear analysis, including plastic and crush simulation etc.
How do you validate your results, and feel confident about the correctness of your analysis?
I know that for linear static FEA, I can (4 out of 5 times) back up the analysis with some manual calc. and sleep well at night (if you don't count the crying baby...)
Any comments?
How do you validate your results, and feel confident about the correctness of your analysis?

I know that for linear static FEA, I can (4 out of 5 times) back up the analysis with some manual calc. and sleep well at night (if you don't count the crying baby...)
Any comments?





RE: Scared of anything not linear static
Test, Test, Test - even if it is a scale physical model or a another simplification of the real structure. Of course you can do simple bounding calculations on many components that act non-linerly, although the bounds may be quite wide. There is no simple single answer, execpt that the validation is too important to 'forget' about!
TERRY
RE: Scared of anything not linear static
Raj
RE: Scared of anything not linear static
How do I sleep at night? Well, if the first order non-linearities agree, then in a sensibly designed system the second order interactions won't be too far wrong, and the third order interactions should be negligible. Hoho.
Cheers
Greg Locock
RE: Scared of anything not linear static