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Material model for plastic films

Material model for plastic films

Material model for plastic films

(OP)
I am new to both ANSYS and this forum and I am hoping for some help.

I want to make a model of a thin film of plastic material (eg LDPE), which is going to melt under cyclic pressure. I am interested in studying the plastic energy.

Lack of material knowledge makes it difficult for me to find a suitable model. I can get as far as realizing that I should choose structural-nonlinear-inelastic but then I don't even know whether it is rate independent or not.

Someone told me that Nonlinear kinematic hardening, CHABOCHE, would be suitable, does anyone else think so?

Thank you!
Sofia

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