摘要
本文采用塌缩三棱柱形奇异单元的位移计算应力强度因子，给出了一个新的全三维外推公式，它是Ｃｈｅｎ和Ｋｕａｎｇ公式〔１３〕的全三维推广，特例证明，它的精度比Ｉｎ－ｇｒａｆｆｅａ和Ｍａｎｕ的公式〔８〕高一阶。数值计算表明。
The method for computing stress intensity factors from three dimensional collapsed quarter point singular elements nodal displacements is presented. A new extrapolation equation is obtained which is the extensions of Chen and Kuang in three dimensions. Particular cases state clearly that the new method performs a high order of accuracy than that of lngraffen and Manu Numerical examples show that the computation is stability and not sensitive to the element size.
关键词
三维
裂纹
奇异单元
应力强度因子
three dimensional crack
singular element
stress intensity factor
