用边界元法解圆柱体半椭圆形表面裂纹问题

Solving the Problem of Semi-elliptical Surface Cracks on a Cylindrical Body by Boundary Element Method

本文用3维弹性静力学直接边界元法对圆柱体半椭圆形表面裂纹问题进行了初步研究。在裂纹前缘附近区域使用了面力奇异的“边中节点”裂纹单元,提出了计算应力强度因子的位移应力共截距法。考虑了圆柱体受纯拉伸和纯弯曲两种载荷情况,计算结果与有关文献作了比较。

In this paper, the problem of semi-elliptical cracks on the surface of a cylindrical body is studied preliminarily by using the Direct Boundary Element Method. Traction singular midside-node crack element is used near the crack front, and a combined method for calculating the stress intensity factors is proposed. The cylinders, under axial pure tension and pure bending, are considered. The calculated results are compared with those available in the literatures.