摘要
本文针对二维裂纹应力强度因子的计算,提出一种特殊的三点非等参曲线边界元。文中对于出现在这种单元上的强奇异积分给出了具体处理办法;并推导出了用这种单元节点位移计算裂纹尖端应力强度因子的具体表达式。算例检验表明本文提出的特殊边界单元优于常用的“1/4节点”单元。
This paper proposes a special three-node non-isoparametric curved boundary element,for the computation of two-dimensional stress intensity factor. The treatment of the strong singular integrals involved in such special elements is given in detail,and the expression of crack-frontal stress intensity factor by the nodal displacements of such special element is derived. It is shown by several examples that the special element proposed in this paper has an advantage over the conventional quarter-point element.
出处
《石家庄铁道学院学报》
1994年第3期1-8,共8页
Journal of Shijiazhuang Railway Institute
关键词
应力强度因子
边界元法
二维裂纹
stress intensity factor
boundary element method
crack element
numerical quadrature
two dimensional crack problem
