Thermo-elasto-visco-plastic constitutive equations fully coupled with ductile damage.Application to metal cutting by chip formation.

摘要

A fully coupled (strong coupling)thermo-elasto-visco-plastic-damage constitutive equations based on the state variables under large plastic deformation developed for metal forming simulation are presented.The relevant numerical aspects concerning either the local integration scheme as well as the global resolution strategy are discussed This model is implemented into ABAQUS/EXPLICIT using the Vumat user subroutine.Applications are made to the orthogonal metal cutting by chip formation and segmentation.The interaction between hardening plasticity,ductile damage and thermal effects are carefully analyzed.The numerical results obtained with this procedure based on the damage coupling are compared with those obtained with the classical procedure neglecting the damage effect