problem with contact between two interfaces

[shima]

I am modeling uterus, cervix and amniotic for my thesis, but a contact problem keeps emerging and after six months I still don't have results.

I have a problem with contact between the uterus and the amniotic sac, I tried both sticky and tied contact. The problem is when Augmented Lagrangian is on, I get negative Jacobian and error in termination, and when it's off, the amniotic sac passes through the uterus. I tried solving it by choosing facets instead of faces and changing the penalty factor, but I still can't get a reasonable result.

thanks in advance