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J2 plasticity

bitamendi's picture

Mixed hardening Amstrong-Frederick and Ludwik J2 plasticity model VUMAT implementation

Hi, I’m trying to implement a mixed hardening J2 plasticity model. The idea is to use the Ludwik law to represent the isotropic hardening and the Amstrong-Frederick law for the kinematic hardening, both combine in a J2 classic von Mises model.


I need some advice for the return mapping algorithm.


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