A coronary stent is a tube-shaped device, which needs a vascular wall crimp
power and bending stiffness reduction, so that a stent matches the blood
vessel without any damage.
But, in a stent end, its radius increases locally (Dog-Boning), which has
an effect to fix a stent to the vascular wall, but an uniform crimp pressure
distribution is more desirable.
With this background, the balloon for stent expansion is modeled by SHELL elements with contact detection, and after the nonlinear FEM analysis, the Dog-Boning behavior is replicated.
The results of analysis is described here in after.
