摘要
提出了一种平面复合型应力强度因子K_Ⅰ和K_(Ⅱ)的新算法。这种算法充分利用了边界单元法的输出结果,同时计及了韧带上的应力和裂纹表面上的位移,且由于采用了裂纹尖端附近应力和位移的渐近展开式的高阶项(第2项),因而提高了计算精度,但并不增加计算工作量。
A new method for calculating the stress intensity factors of plane mixed-mode crack is presented, which makes full use of the output from BEM. Both displacements of the crack surface and stresses on the ligament are used to calculate KⅠ ang KⅡ, hence this method is called a hybrid method. The second order terms of series expansions for stresses and displacements near the crack tip are used to improve the accuracy of computation without extra computing efforts. An example illustrates this method to be effective.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
1992年第3期85-91,共7页
Journal of Chongqing University
关键词
断裂力学
应力强度因子
裂纹
fracture mechanics,stress intensity factor(SIF) ,mixed-mode crack,boundary element method (BEM), hybrid method
