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本文根据弹性力学中确定三向应力状态主应力的三次方程,编制了一个SAP5程序中8～21可变节点三维块体单元应力计算的后处理程序。应用该程序可迅速、准确地计算出8～21可变节点三维块体单元的主应力和主方向。
In this paper, according to the third order equation of the principal stress in the three-direction stress state in elasticity, a postprocessing program of stress calculation of 3D block units with 8 ~ 21 variable nodes in SAP5 program is developed. The program can be used to calculate the principal stress and main direction of the 3D block of 8 ~ 21 variable nodes quickly and accurately.