初应力法求解拉压双弹性模量的空间问题

Solution of 3 D elastic dual extension compression modulus problems using initial stress technique

采用等参单元，在相应的单元高斯积分点上判断应力状态，利用初应力法，以提高计算精度和效率．由于是在所有的高斯积分点上，而非在形心处进行应力状态判断和修改。

In order to improve the computational accuracy and efficiency, initial stress technique and isoparameter finite element are employed, and the stress state is checked and adjusted at Gauss integral points.