Comparative study of phenomenological coupled damage models - Application to industrial forming processes

Abstract : Xue's damage model [Xue, 2007] accounts for the third invariant of deviatoric stress tensor, allowing a better balance between respective effects of shear and elongation on damage. It has been implemented in Forge® Finite Element (FE) software to investigate ductile damage occurring during industrial forming processes. Material and damage parameters identification has been carried out for both Xue and Lemaître models. Application to wire drawing followed by flat rolling shows that in such shearinducing processes, both models predict damage at different locations, due to their different emphasis on shear with respect to elongational strain damage.