Numerical Simulations of Ductile Crack Propagation Growth in Thin Specimens Basedon a Cohesive Zone Model

摘要

Ductile crack growth in a thin Compact Tension (CT) specimen is numericallysimulated using a finite element method based on a cohesive zone model. Numerical results are shown to be in fair agreement with experimental records. It is confirmed that the separation energy based on the cohesive zone model is constant for a homogeneous fracture process and different for normal and shear fracture. Results suggest that separation energy can be used as a single fracture parameter for whole fracture events for both crack initiation and stable crack growth.