Hi every one

I m working on modeling anisotropic hyperelastic model for human cornea

in Ansys v.10 ,and I derive the coefficients of constitutive three terms strain energy (volumetric,isotropic,anisotropic) from literature.

But I faced the problem in modeling this material in Ansys v.10

and I dont have information about how to use UMAT in modeling this material.

I need some help on predifined macro for anisotropic hyperelastic matrial model

Any help with this problem would be appreciated.

Thanks a lot.