【摘要】 无网格伽辽金法(EFGM)是近年来兴起的无网格法的一种,与传统的有限元等数值计算方法相比,它只需要节点信息和计算域的几何边界.由于不需要网格重构,裂纹扩展只需要通过自由裂纹面的延伸来模拟,这大大简化了裂纹模拟的过程.本文综述了EFGM在疲劳裂纹扩展中的应用,对扩展基的使用、权函数的选择及裂纹扩展的模拟方法和动态应力强度因子的计算进行了论述更多还原

【Abstract】 Element-free Galerkin method(EFGM) is one of the new meshless methods in recent years,which uses only a set of nodes and a boundary description of the calculate domain compared with the traditional numerical methods such as the Finite element method.Due to no elements remeshing needed, the growthing crack are modelled by simply extending the free surfaces,which simply the process of the propagation of the crack. The application of EFGM to fatigue crack propagation is presented in this paper,and the use of enriched basis function,choice of the weight function, simulation of the fatigue crack and the calculation of the dynamic stress intensity factor are given.更多还原