Sean Harvey
Ansys Employee

Hello,

So, it might be happening is you are loading too quickly and the contact is not detected.  You should turn on auto time stepping (autos, on) and then set the NSUBST command so that you are breaking the load into smaller amounts (set min, max, and initial), as what could be happening is the force you apply is enough to push the parts beyond contact (larger than the contact pinball region).

Please try this.

Regards,

Sean