Hi guys! I am having an issue where my assembly does not want to solve. What I have is a lock ring that I want to compress. I want to study the effect of adding relief holes in various locations/patterns to the stress throughout the ring. The way I would like to do it is by creating a ridig body that has an ID located at the position I want the lock ring's OD and using a shrink fit between the external surfaces of the lock ring to the internal face of the rigid ring as shown in this picture: http://i.imgur.com/lizwC.jpg. I have large displacement on. I have tried both fine and coarsh meshes. I have tried both solvers. But every time my solver fails. When I remove the relief holes, the model does solve. I am unsure what else I should try.