Anisotropic Material Tensor

[tjdodwell]

This looks great.

I wondered if you had implemented an anisotropic material law?

Thanks

[david-kamensky]

It's not in the demos, but has been done by various users. See, e.g., the analysis here, which used Kirchhoff--Love shells implemented in tIGAr. Implementing a constitutive model in UFL is easy if you have a closed-form stress--strain relation. The main practical challenge with anisotropy is typically choosing a way to represent the local material direction(s) rather than implementing the model itself. However, this is often also problem-specific and dependent on the format of upstream data used to set up the model.