关于材料模式的问题.求助!
做的一个加筋地基的问题9n ]%U;pS}(W^单元组二用的shell单元,线性各项同性弹性材料D^#V/eR
计算时出现这个提示:(sCB6~(^[vK N
Model errors exist - file C:\Documents and Settings\Administrator\桌面\jiajin3D\tt\1.dat has not been created.5EI AlV
Please resolve conditions indicated by ERROR or ALERT
messages given above.lu8FLyEP&c ZS;g8G
***WARNING: No element loads generated on surface 35I holf!mE
resulting from load application 2.
***INPUT ERROR: Invalid default material model for element group 2.6P4`U;TB'?8i3L
请问怎么回事?谢谢
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