J-integral Calculation of Nonlinear Fracture for Colloidal Soft Material

摘要

J-integral of nonlinear fracture for the colloid soft material is calculated by the finite element method in this paper.The J-integral is based on the concept of conservation of energy,hardly depending on the crack-tip stress singularity.Therefore,the fracture of colloidal soft material could be characterized by the J-integral.In this paper,a limited area near the crack tip replacing the integral loop is used to calculate J-integral value.J-integral within one unit is approximated by summation of the formulas related with gauss points.Such repeatedly,J-integral corresponding to integral path is calculated.Effect of different loading conditions and crack lengths on J-integral of PVA-H nonlinear fracture mainly is emphasized.This study shows that the J-integral can effectively characterize the nonlinear fracture of colloidal soft material.