【求助】请教关于optistruct求解应力的问题
optistruct在求解的时候求解出这么多的应力类型，我不太明白这么多求解的结果都各有什么用啊？最主要的一般用哪几个来评价啊？？麻烦哪位老大能把常用的解释一下！先谢过了！ 麻烦谁给解释一下啊 在线等谢谢了 其实很多都在材料力学里面学过，常用的有位移，mises应力，最大主应力，最小主应力。 有没有详细的解释啊 呵呵，要加强理论学习哦 也就是各种判断准则问题，要对应于要算什么 同意楼上说法 Comments
1. "Von Mises Stress" and "Maximum Principal Stress" apply to 1-D, 2-D, and 3-D elements simultaneously.Other results apply to 2-D or 3-D elements exclusively.There are no specific results for 1-D elements.
2. For frequency response loadcases, (comp) may be replaced by (real) (imag) (magn) and/or (phas), depending on the complex format request.
3. "Maximum Principal Stress" is the maximum absolute principal stress :
max(abs(P1(Z1)),abs(P1(Z2)),abs(P3(Z1)),abs(P3(Z2))) for shells.
max(abs(P1),abs(P2),abs(P3)) for solids.
4. "P1 (major) Stress (max)" is the maximum major principal stress :
max(P1(Z1),P1(Z2)).
5. "P3 (minor) Stress (min)" is the minimum minor principal stress :
min(P3(Z1),P3(Z2)).
6. "Signed Von Mises Stress" is the Von Mises stress with traction/compression sign:
sign(P1+P2+P3) * VonMises.
至于用什么值来评价家，就要看你的材料类型了。根据材料力学，一般有四种常用强度理论，第一、二理论适用于脆性材料，一般用P1、P2、P3来评定，而第三、四理论适用于塑性材料，一般用Von Mises Stress 评定。
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