Recently I work on Finite Element Modeling of a human vertebral body, and focus on intervertebral disc.
Based on Its structure which consist of collagen fibers I have to use the Anisotopic hyperelastic model, and I derived the coefficients of strain energy function.
But I have some troubles to modeling this material in Ansys v.10 or v.12
Beacause I have to use user material subroutine and I have not enough
information about how to define material with macro in Ansys.
Please can someone help me with this routine, I read the help but i dont understand anything. thanks!