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未名之鲲

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专业: 岩土力学与岩土工程

[求助] 有license的童鞋帮我看一下这个错误怎么解决，链接如下

错误number：1150
http://www.comsol.com/support/knowledgebase/1150/

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1楼 2013-03-10 13:10:26

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

mikefallon

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xiegangmai: 金币+2, 谢谢参与！ 2013-03-10 22:37:21
未名之鲲: 金币+5 2013-03-11 08:58:15

1. Problem Description
Why do I get the error Failed to compute elastoplastic strain variables when using plasticity/concrete/soil plasticity?

2. Solution
This happens because the elastoplastic element cannot evaluate a plastic step if the current stress state is outside of the yield surface. There are two situations where you may encounter this problem:

In the first load step
The elastoplastic element fails to evaluate the consistence conditions (due to either loads, displacements, initial stress/strains), and it fails to compute the first elastic-predictor step. That is, your initial state, e.g. assumed in-situ stresses in a geomechanical problem are outside the yield surface.

During postprocessing
When results are requested at other positions than the Gauss points, the elastoplastic element actually performs a stress computation. If the gradients of the elastoplastic strains are a large within an element this computation may fail. If this happens, use the Gauss point variables such as solid.sGpx instead of general variables like solid.sx.