Polyurethane material model / coefficients

[QUOTE=Jorgen,3421]If all you know is E and nu, then the best you can do is to use a neo-hookean material model.

You said that you think you got too much compression. How much error do you suspect you got?

- Jorgen

Forgive my ignorance but how exactly can we do that? Im also trying to build this model and all i have is E and nu....

You can convert from E and nu to the Neo-Hookean parameters (mu and kappa) using the equations [URL= https://polymerfem.com/faq.php?faq=polymerfem_faq#faq_elastconstants ]here[/URL].

-Jorgen

[QUOTE=Jorgen,12967]You can convert from E and nu to the Neo-Hookean parameters (mu and kappa) using the equations [URL= https://polymerfem.com/faq.php?faq=polymerfem_faq#faq_elastconstants ]here[/URL].

-Jorgen

Thank you very much Doctor Bergstrom.

PET modelling in abaqus

i am using abaqus for first time. i have two months period and i have to model a polymer material. could u help me how exactly i should proceed considering that i neither have expertise nor time to complete this project.

i am using PET polymer and i have performed uniaxial tensile test for this material so i do have stress strain curve for this material. If there is an in-built model in abaqus for polymer, that would be excellent since only material parameters i have are E and nu and ofcourse stress-strain rate curve.