Damage model for simulating fracture behavior involving frictional contact on crack face and its performance verification

Abstract

This paper presents a damage model for simulating fracture behavior involving frictional contact on material interfaces or crack faces. The model consists of a scalar-valued damage variable based on fracture mechanics for evaluating the crack growth and modeling of frictional contact on crack faces based on the Coulomb friction law for simulating mode II crack behavior in a compressive field. A new formulation of the damage model for 3-dimensional (3D) problems is presented on the basis of 1-dimensional composite bar problems. Several numerical examples on 3D cohesive mode II fracture problems are solved to demonstrate the validity of the proposed model. The results reveal that the proposed model allows simulation of mode II crack behavior involving frictional contact with little mesh-dependency. Good agreement is also found between the numerical and experimental results.