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Holzapfel hyperelastic material model local fibre directions

Holzapfel hyperelastic material model local fibre directions

Holzapfel hyperelastic material model local fibre directions

(OP)
Hello,
I am modelling a porcine aorta as a tube with constant thickness under uniform internal pressure with one fixed end and the other free. The free end is plugged with a linearly elastic material E=200GPa and v=0.3. the material model I am using to simulate the aorta wall is the Holzapfel anisotropic hyperelastic. The angle between the two fiber families is 39.379 degrees and the material parameters have been determined through non linear least squares optimization. My question is if I am defining the local directions of the fibre families correctly and if there is a way to visualize them in the viewport. The .inp file I used is attached.

Thanks!

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