Error: Failed to compute elastoplastic strain variables

解决方案编号: 1150
标题: Error: Failed to compute elastoplastic strain variables
平台: All Platforms
适用于: Structural Mechanics Module, Geomechanics Module
版本: All versions
类别: Error Messages
关键字:

问题描述

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

解决方法

This happens because the elastoplastic element cannot evaluate a plastic step if the current stress state is outside of the yield surface. There are three typical 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.


免责声明

COMSOL 尽一切合理的努力验证您在此页面上查看的信息。本页面提供的资源和文档仅供参考,COMSOL 对其有效性不作任何明示或暗示的声明。COMSOL 对所披露数据的准确性不承担任何法律责任。本文档中引用的任何商标均为其各自所有者的财产。有关完整的商标详细信息,请参阅产品手册。