Experimental characterization and damage modeling of a particle reinforced TWIP-steel matrix composite

A phenomenological damage model is proposed to describe the mechanical behavior of a particle reinforced TWIP-steel matrix composite. Starting point of the study is Rousselier's model for ductile damage of metals, which is extended by a damage nucleation criterion. This criterion involves an overall progress of particle based damage events like particle cracking or debonding from matrix. The dependency of the material behavior on triaxiality and Lode-parameter is taken into account. Micromechanical simulations and experiments are used to test and calibrate the model. Deformation behavior, damage evolution and final failure predicted by the calibrated damage model are in good agreement with numerically generated and experimentally determined material data.