Hi,
I am modeling a contact problem. I have chosen Hyperelasticity+permeabilty for catilage material. I apply a displacement over a short time and fix it over a long time to see the force relaxation procedure. during loading time we assume that the boundries ar impermeable but over long time are permeable.
there are some questions that I'm facing with:
1) Shall I use one step and put permeable Boundaries?
2) Since we assume that solid skeleton is incompressible, What we should choose for poisson's ratio during loading and force relaxation? when I choose v=0.4995, my pore pressure graph is not what I am looking for.
Looking forward to hearing from you,
MH