求助!!!!lsdyna为什么出现下列问题
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*** Error 20385 (STR+385)
material number 1 specified type= 20 is invalid
for ale solid elements
*** Error 20018 (STR+18)
input phase completed with 1 fatal errors
please check messag file 请问为什么出现这样的问题 怎么解决呢?
material number 1 specified type= 20 is invalid
for ale solid elements
*** Error 20018 (STR+18)
input phase completed with 1 fatal errors
please check messag file 请问为什么出现这样的问题 怎么解决呢?