The degradation function models the mentioned coupling by reducing the stiffness of the material and the plastic contribution of the energy density in broken material. The application of an unaltered radial return algorithm on element level is possible due to the choice of an appropriate coupling between the nodal degrees of freedom, namely the displacement and the crack/fracture fields. An energy functional consisting of an elastic energy, a plastic dissipation potential and a Griffith type fracture energy constitutes the model. In this contribution a phase field model for ductile fracture with linear isotropic hardening is presented.
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