橡胶超弹性分析

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本人正在做一个橡胶超弹性分析，由于超弹性材料属于非线性分析，发觉计算很难收敛，估计是材料参数和网格的问题，还望各位赐教，也可以给各位新手提供一个超弹性分析的小例子，先谢过了。分析软件版本Ansys 12.1

yzx088

承蒙版主赐教，材料模型定义如图所示，根据计算结果，看起来材料模型有问题，但是不知如何修改，请赐教

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计算后错误提示如下：
1. Warning: Solver pivot warnings have been encountered during the solution.  This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues.  Check results carefully.       
2. Warning: The unconverged solution (identified as Substep 999999) is output for analysis debug purposes. Results at this time should not be used for any other purpose.       
3.Error: The solver engine was unable to converge on a solution for the nonlinear problem as constrained.  Please see the Troubleshooting section of the Help System for more information.
由于计算模型超过附件1，000K（24小时），随后上传

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再贴几张图片供大家参考

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自己给自己顶一下，最大的问题是变形量太大了网格畸变，及非线性分析不收敛，问题大部分以解决，谢谢各位关注！