Hello everyone,

I tried to create an Abaqus input file to simulate a hyperelastic anisotropy case based on Holzapfel's model but somehow the inp file does not include the gamma (angle) parameter depicting the fiber direction. I have used a discrete orientation for the element coordinate system.

Is it possible to guess the reason ? Thanks in advance!

PS: An example from Abaqus documentation can be found here which defines the gamma parameter: https://abaqus-docs.mit.edu/2017/English/SIMAINPRefResources/adventitia_axial.inp