If is nonlineal, you should define two points (load or displacement) near to your interest area and take the stiffness (secant) at this points, but you must always inform that points. Is the way used for rubber part that are not perfectly lineal springs.
Hi, I'm in charge of the FEA team in an automotive company, so we deal (and suffer) with that numbers, please send me a PM if you need the real numbers. Guess that is not possible to post it directly.
Hi, I'm trying to do a drop test of a PET bottle, using the Abaqus Manual Example:
https://www.tu-chemnitz.de/projekt/abq_hilfe/docs/v6.13/books/exa/default.htm?startat=ch02s03aex85.html
I was able to run the model, but now I want to use my own bottle. I managed to introduce in the assembly...
Hi, I'm doing some FEA of PET bottles, but I want to take in count first the air trapped inside (as if the test were with the empty closed bottle), second with water inside, and after with a mix of water and air.
I have tried to apply a pressure inside the model, but it inflates that doesen't...