摘要
本文推导得到了一个新的等参数奇异单元,它仍然是四边形四分之一节点奇异元。数值实验表明,它要比常用的四边形四分之一节点奇异元精度更好,使用这种单元可以使断裂问题的有限元计算效果更好。在计算过程中还利用到改进等参变换。
A new singular element has been developed by using an Improved Isopar. ametric Transformation. Numerical results show that thenew element can solve the fracture problem more accurately than the widely used quater-node quadrilateral element and the new elemnt can be easily used in the isoparametric FEM programs also.
出处
《宁波大学学报（理工版）》
CAS
1989年第2期29-33,共5页
Journal of Ningbo University：Natural Science and Engineering Edition
关键词
有限元法
断裂
应力强度因子
Finite element method, Fracture, Stress intensity factor
