Exploring the Design and Structural Analysis of Innovative Auxetic Coronary Stent

A novel approach is presented to address the drawbacks associated with traditional stents. Through the utilization of a stent featuring an auxetic structure, characterized by a negative Poisson’s ratio, the objective is to enhance energy absorption and radial strength of the scaffold, potentially providing advantages over conventional stents. The implementation of an auxetic stent shows promising potential for performance improvement. Consequently, this study focuses on the design of three stents by enhancing a tetrachiral unit cell and conducting numerical investigations using SS 316 L alloy. The modified auxetic stents exhibit higher auxeticity and a negative Poisson’s ratio (NPR) of −1.13 and −0.67. Such applications hold great significance in the medical field, as the enhanced radial support can help prevent recoil and maintain stent size, effectively preventing stent migration and enhancing patient safety. We aim to gain valuable insights into the behavior of this innovative unit cell, which may significantly impact the advancement of stent.