回复:
如果要为正交各向异性材料定义失效准则 s,则必须在材料模型(图 01)中定义正交各向异性塑性材料。
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材料模型
The yield criterion will be taken according to the Tsai-Wu criterion (Image 02).
Under this link, you can find a full set of verification examples to this material model:
The material model itself is explained in several technical articles of our Knowledge Base: