Recently i work on finite element model of a human vertebral body, and focus on intervertebral disc.
Based on its structure which consist of collagen fibers i have to use anisotropic hyperelastic model with reinforced fiber, 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, because i have to use user material subroutine and i have not enough information about how to define material with macro in ansys
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