UMAT子程序，非线性模型不收敛，请帮忙看看
问题如下：简单的路面结构，其中一层材料使用UMAT编写的非线性模型（3参数模型），其他材料均为线弹性。施加移动荷载后，不收敛，尝试了多种调试，仍然无法收敛。调整子程序里的输入参数，设计成线性的也无法收敛，初步判断是刚度矩阵的问题，即应变增量乘以刚度矩阵，对应力增量的变化很小。希望大家帮忙看一看代码，实在查不出问题在哪里，十分着急！错误代码：
Time increment required is less than the minimum specified
The analysis has been terminated due to previous errors. All output requests have been written for the last converged increment.
Abaqus/Standard Analysis exited with an error - Please see themessage file for possible error messages if the file exists.
msg文件里出现warning:
***WARNING: EXCESSIVE DISTORTION AT A TOTAL OF 6476 INTEGRATION POINTS IN
SOLID (CONTINUUM) ELEMENTS
***NOTE: ELEMENTS ARE DISTORTING EXCESSIVELY. CONVERGENCE IS JUDGED UNLIKELY.
***WARNING: CONVERGENCE JUDGED UNLIKELY.INCREMENT WILL BE ATTEMPTED AGAIN
WITH A TIME INCREMENT OF 6.00110E-05
各位指点一下，谢谢啦 楼主，你好，最近也在学习路基土Uzan模型编程，可否加个好友互相学习，qq1084661307 修改step 时间
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