Good afternoon! 

I have been doing some simulation work to model the behavior of fiber optic cables under temperature cycling. While I've had some good success, I'm trying to run this simulation many times with slightly different properties and loads to see how it behaves. The simulation is pretty complex and even after simplifying the less essential parts and adding mesh controls to increase resolution only on the essential contacting surfaces, it takes about 48 hours to run. 

I'm looking for tips to reduce run time. If I reduce the mesh quality too much, the round faces start to get too blocky and bodies start to clip in weird ways. I had been using a blended mesh which was taking even longer - in draft mode though the mesh was actually passable if I turned the quality all the way up and it only took about 10 hours to run - that's my backup plan. Now I am using curvature-based mesh as it seems like I can keep my curves and use less elements. 

In the model, there are concentric tubes that are extruded along the same equation driven line - these have different material properties but each shared surface is locally bonded. I thought I saw online that there was a way to have bodies that share identical surfaces use the same nodes but I can't seem to find such an option, I was wondering if something like this could cut down on simulation time. 

Other than this or just using draft quality, I'm out of ideas to reduce the runtime and would love any suggestions! Let me know if you have questions about my model, I'll post pictures of my settings. 

Thanks!