基于EFG法复合型裂纹扩展的数值模拟研究

Based on Element-free Galerkin method, the essential boundary condition was implemented through full transformation method. By using the property of path-independent of M integral in the fracture mechanics, an efficient EFG method for numerical simulation of mixed-mode crack was proposed. Adopting the singular basis function, the stress intensity factors of single edge-crack plate under the far-field shear load was calculated, then the - mode crack propagation was simulated based on the maximal circumferential stress criterion. The burdensome of remeshing required by finite element method, the numerical example shows, is avoided and the simulation of crack propagation can be simplified as well.