在ADINA-AUI中对摩尔库伦土体模型施加温度荷载，不收敛问题

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在7层土体模型中对所有体施加1℃的温度体荷载，对第五、六、七层土体摩尔库伦材料分别设置0.0056、0.001、0.006的线膨胀系数来模拟地下水位以下土体的膨胀变形，在运算过程中，摩尔库伦模型出现不收敛现象。（将线膨胀系数统一修改为0.001则可正常运算）

试求不收敛问题的解决办法。

w2491266891

以下是out文件中的错误描述：

Diagnostics: ---------------------------------------------------------------------------------------------
- Ratio of factorized diagonals increased by factor of   2.939E+04  from   3.000E+01  to   8.816E+05
- Maximum factorized diagonal changed sign.   Previous value =   1.621E+05   Current value =  -6.071E+07
----------------------------------------------------------------------------------------------------------



NUMBER OF TRIALS TO OBTAIN THE STRESSES IN THE MOHR-COULOMB MATERIAL MODEL GREATER THAN 1000
     GROUP NUMBER      :     2
     ELEMENT NUMBER    :  3352
     INTEGRATION POINT :     7
CHECK MODEL AND MATERIAL CONSTANTS, AND TRY A SMALLER LOAD STEP OR THE ATS FEATURE
Diagnostics: ______________________________________________________________________________________________________
** FAILED CONVERGENCE ANALYSIS **

Trend: No trend detected from iteration history

Symptoms:
- Big increase in out-of-balance forces at iteration     1

Most probable causes and remedies:
- None detected. Please check the whole model.

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问题解决方案猜想：温度荷载和对应的线膨胀系数设置值过大，导致摩尔库伦模型进入塑性阶段，增大材料的内摩擦角和粘聚力可解决不收敛问题。