Ana Regina Dehesa

Hello Peter,

First of all I sincerely appreciate you taking the time to read through my post and reply with so much detail! I had to take a pause on this project to take care of other responsibilities, so I apologize for the late response. 

I decided to go about it the second way (stent diameter made larger than inner diameter of artery). I was able to get the model to run and give reasonable results (I just had to add an APDL command "NEQIT,50"). 

I'm now attempting to do the same thing but using an actual stent geometry, not a rod anymore. I'm still using a cylinder for the artery. I've followed the same steps except now the remote displacement on the flat end of the rod is just applied to the end faces of the stent retriever. 

I was able to get the model to run with reasonable results, but the duration of the simulation is very long. I'm almost sure it has something to do with my analysis settings.

I initially used a small displacement (1.5 mm) but after that worked, I tried increasing the displacement distance but keeping the same speed. I did this by adding steps to the model (changed it from 2 steps to 6 steps... I think this is where the problem is) to end up with 7.5 mm of displacement over 5 steps (1.5 mm per step). 

The model ran and gave me reasonable results but took almost 40 hours to run... 

I'm sure there's a better way to do this. Any guidance as to what I can optimize the model is very much appreciated. I've attached screenshots of the mesh, what the remote displacement with the tabular data looks like, and what the equivalent stress looks like on the artery after running.

Once again thank you so much, you've been so very helpful.