A comprehensive study of a multiplicative elastoplasticity model coupled to damage including parameter identification

Abstract

In this contribution various aspects for a plasticity model coupled to damage are considered. The formulation of the model is performed in the intermediate configuration which occurs as a consequence of the multiplicative decomposition of the deformation gradient. We will resort to thermodynamic consistency, continuous tangent operator, algorithmic tangent operator and sensitivity analysis for parameter identification. Furthermore, for the discretized constitutive problem a robust iteration scheme with a two-level algorithm is proposed. In the numerical example material parameters are determined by least-squares minimization based on experimental data obtained with an optical method.