论坛 › J01：有限元数值方法 › 几何刚度矩阵（初应力矩阵）

大地飞莺 发表于 2013-1-17 16:20:37

几何刚度矩阵（初应力矩阵）

有研究几何非线性的大侠吧，你们几何应力矩阵积分计算用的应力矩阵是柯西Cauchy应力矩阵还是第二类Piola-Kirchhoff应力矩阵，为什么？谢谢啦！

tonnyw 发表于 2013-1-17 22:05:17

It depends on what kind of formulation you are using. For large displacement + large rotation + small strain, you are using Total Lagrangian Formulation which needs the second Piola-Kirchhoff stress matrix while for large displacement + large rotation + large strain, you are using Updated Lagrangian formulation which requires Cauchy stress matrix.

大地飞莺 发表于 2013-1-22 14:56:54

tonnyw 发表于 2013-1-17 22:05 static/image/common/back.gif
It depends on what kind of formulation you are using. For large displacement + large rotation + smal ...

:loveliness:Thank you for your answer。Can you add me QQ 651617069？ I want to know what array Eigenvalue buckling analysis use

tonnyw 发表于 2013-1-22 23:19:31

What kind of book are you reading? Can you put here the part you are reading so everyone can take a look?

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