Damage Prediction and Evolution using Uncoupled Elastoplastic-Damage Lemaitre’s and Vaz’s Models

This paper presents the two uncoupled elastoplastic-damage models; Lemaitre’s and Vaz’s damage models. The models are implemented into finite element ABAQUS software using user routine UMAT to analyze predict evolution. In context of von-Mises yield criteria, variable fracture indicator predicted, in addition stress effective plastic strain. Both elastoplastic tangent operator return mapping procedure formulated consistent formulation. Two cases have been analyzed; first one is an axisymmetric notched bar, while second case a plane strain doubled plate. aforementioned predictions, parametric study carried out explore effect denominator exponent on behavior. It concluded that succeeded prediction point fracture, Lemaitre's model gives more efficient description band.