摘要
本文中,利用有限元重合网格法(s-version FEM, S-FEM)研究分析了圆棒表面两个非共面裂纹间的相互作用。有限元重合网格法是在有限元法的框架中,将整体网格与局部网格叠加的方法。该方法便于建立多个裂纹的有限元单元网格。利用虚拟裂纹闭合方法计算裂纹前端的应力强度因子。通过改变两个裂纹间的相对距离和裂纹尺寸等形状空间参数来分析其对应力强度因子的影响。此分析结果能对结构损伤评估具有一定的参考价值。
In the present study, the interaction of two non-coplanar cracks in round bars was investigated using the superposition finite element method (s-version FEM, S-FEM). The S-FEM, in the frame of finite element method, is a global-local overlaying method. The advantage of this method is saving the effort in FE modeling for multiple cracks. The virtual crack closure method is used to crack stress intensity factors. The interactions of two static cracks were analyzed by changing the relative distance between the cracks and the crack sizes. The analyses results may provide a reference for structure damage evaluation.
出处
《建模与仿真》
2017年第2期90-97,共8页
Modeling and Simulation
