We have performed an uniaxial compression test of some stacks and got a stress- strain J curve as shown in image.
I am trying to utilize this curve as my material input and mostly tried everything feasible starting from plastic model to Hyperelastic models but simulation shows a huge margin as compared to test results. Only Marlow material model shows the promising results, but it doesn't converge fully.
Ehsan Soleimanifar
You might need more tests to define different parameters of the corresponding material behavior. By considering only this graph, hyperelastic models seem to be reasonable choices. You can also take at HEEDS package for model calibration since it might be helpful as well.
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Raafat E S Ismail
why don't use multilinear isotrobic plasticity model, it may work
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