Elastic/ Hyperelastic material model

[cmc123]

Hi,

Just a quick modelling question. I am FEA modelling a grade of polyurethane but I am only interested in strains as high as about 10-15% tension. Since these strains are relatively small can a linear elastic material model be used accurately here as opposed to hyperelastic?

Thanks,

Chris

[Jorgen]

I would say that 10% to 15% strain is relatively large, and you should use a hyperelastic model (if you don't need accurate results) or a viscoplastic material model (if you need more accurate predictions).

-Jorgen