Stent deployment fails to converge with more components
I am trying to simulate a stent expansion with the aid of a balloon, which is simulated as a cylinder in my model. The stent converges successfully when it is comprised of 2 rings (4 symmetrical bodies that share topology) as shown in image (1). However, when I add up more components of the stent, namely 4 rings (8 symmetrical bodies that share topology) as shown in image (2), while maintaining the same constraints, the solution fails to converge short after the balloon touches the stent and some deformation has occurred to the stent.
Are there any suggestions? Allow me to provide any further information needed.