Modify the neo-Hookean solid code for more general hyperelastic model

[tengzhang48]

Hello,

I just tried the PyFEM on the Expanse cluster supported by SDSC. It is very convenient to install the software, which is very nice. Thanks a lot for your effort. I tested the ex10p and found it works well. I have a general question for implementing more complicated hyperelastic models, such as Arruda–Boyce model and Gent model, which are similar to the neo-Hookean model. It is also interesting to know how to code other models based on more different formulas, such as Ogden model.

In addition, I am also interested in Multiphysics problems, such as hydrogel swelling. I am wondering whether there is a general strategy to achieve these goals? I guess the technique questions are: Can we achieve this through python script only? If we need to modify the c++ MFEM code, how should I create a new function? The current examples are very impressive, but I did not find one to teach how to configure a multiphysics solver yet.

Thanks a lot.

Best, Teng