Mises plasticity model with isotropic damage - MisesMat

This model is appropriate for the description of plastic yielding in ductile material such as metals, and it can also cover the effects of void growth. The model uses the Mises yield condition (in terms of the second deviatoric invariant, $J_2$), associated flow rule, linear isotropic hardening driven by the cumulative plastic strain, and isotropic damage, also driven by the cumulative plastic strain. The model can be used in the small-strain context, with additive split of the strain tensor into the elastic and plastic parts, or in the large-strain context, with multiplicative split of the deformation gradient and with yield condition formulated in terms of Kirchhoff stress (which is the true Cauchy stress multiplied by the Jacobian).


Borek Patzak