Modelling of ductile damage in single point incremental forming process using enhanced CDM model

Abstract

Investigation of the ductile damage in single point incremental forming (SPIF) is necessary for improving the formability during the manufacturing process. In this paper, an enhanced Continuum Damage Mechanics (CDM) model was applied for ductile damage prediction in SPIF process. In particular, the stress state dependence was considered in the damage evolution to improve fracture prediction capability at various loading paths. The enhanced CDM model was implemented into finite element code ABAQUS/Explicit through user subroutine VUMAT. The accuracy of the finite element model to predict the failure during SPIF process was investigated, good agreements were found between the simulation results and the experimental observations.