Modeling the Plasticity of Orthotropic Materials using Generalized Hill

I am attempting to model anisotropic plasticity using the generalized hill model with a very simple geometry.

However, I am experiencing errors that say that anisoptropic plasticity is not supported by the elements I have chosen, SOLID185. I have tried many different elements which all yield the same error.

I would appreciate feedback on this issue - particularly which elements are supported using anisotropic plasticity?

A file is attached describing the model and the errors, as well as the APDL code used to generate the model.



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