Finite Element Analysis of Mechanical Behaviors of Multi–Link St

Stenting is one of the most important methods to treat atherosclerosis. Due to its simplicity and efficiency, the use of coronary stents in interventional procedures has rapidly increased and different stent designs have been introduced in the market. In order to have the better output of stent implantation, it is needed to analyze the mechanical behavior of this device before manufacturing and utilizing. One of the most effective methods to investigate the mechanical behavior of the stent is finite element method. The aim of this work is to investigate the expansion characteristics of a stent (Multi-Link stent) as it is deployed and implanted in an artery containing a plaque and propose a model as close to real conditions of stent implantation as possible. A bi-linear elasto-plastic material model for stent and hyperelastic material models for balloon, artery and plaque have been assumed. This model includes the internal pressure of blood. Stress distribution, radial gain, outer diameter changes and dogboning are investigated.