Bad Material definition in element number 1 instance x

有薄荷叶碎

使用VUMAT编译内聚力单元的本构后，同样的模型，使用指数型子程序能出结果，但使用多项式子程序后，出现错误警告信息：Bad Material definition in element number 23402 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23403 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23404 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23405 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23406 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23407 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.

Bad Material definition in element number 23408 instance COH-H-5-1-PART-1-1: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary.
错误信息很大一串，想请教一下大家，应该怎么处理啊？我调整了材料参数依旧还是这种情况

simon1106

请问你解决这个问题了吗？

有薄荷叶碎

simon1106 发表于 2018-7-20 09:41
请问你解决这个问题了吗？

抱歉这么久才看到，这个问题解决了，最后发现还是VUMAT子程序的问题，对参数的输入格式不对导致了这个错误

时光谣

有薄荷叶碎 发表于 2018-8-13 11:26
抱歉这么久才看到，这个问题解决了，最后发现还是VUMAT子程序的问题，对参数的输入格式不对导致了这个错 ...

那参数的输入格式要怎么改呢，刚接触VUMAT，一头雾水

是大圣啊哈哈

楼主方便说一下改的参数格式吗，我用vumat也出现了这个问题，很多人都说是程序文件出了问题