hyperelastic and viscoplastic behavior

[afefdridi]

Hello

Please i have to model an elastomeric ring all what i know is that is made from polyrethane so i supposed that it's behavior is hyperelastic and viscoplastic orviscoelastic with hysteresis. Can anyone tell me if it is necessary to write a umat to caracterize my material. Or it is sufficient to fill in abaqus the hyperelastic and viscoelastic and mullins effect options. Can any one tell me how to do
thanks a lot

 

[IceBreakerSours]

What experimental data do you have to validate your model against? Take small and easy steps first before you think about the more advanced formulations.

Please be careful of subroutines or advanced material modeling unless you have a LOT of expert help.

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