三维裂纹应力强度因子计算方法的改进

Improvement on the Calculation of the Stress Intensity Factor in 3-D Crack Problems

应用边界元法解三维裂纹问题时,应力强度因子的计算占有重要地位。本文在采用面力奇异的“边中节点”裂纹单元基础上,引入改进的椭圆参数方程,推出一种计算应力强度因子的新方法,经算例检验,精度较高。

The calculation of stress intensity factors plays an important role in applying BEM to 3-D crack problems. Based on the traction singular mid-side-node crack elements, the improved para metric equation of ellipse is introduced and a new method for the calculation of stress intensity factor is derived in this paper. Examples reveal the high accuracy of the method suggested.