砂土本构次弹性

Wangqiang1

做了一个砂土本构的次弹性vumat,模型就是一个板压在土上，计算不了，求大神指教。提示错误：
The elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively.

There is only one excessively distorted element

The elements contained in element set ErrElemExcessDistortion-Step1 have distorted excessively.

Abaqus/Explicit Analysis exited with an error - Please see the  status file for possible error messages if the file exists.