Modeling and elastic simulation of auxetic magnesium stents

Abstract

Auxetic materials are characterized by getting thiner/ larger in tension/compression. This counterintuitive behavior is advantageous in specific applications such as self-expandable stents. There are currently some stents that make use of this behavior, nevertheless there are still auxetic geometries that are not explored in this field. Additionally, Pure Magnesium is a promising material to manufacture bioabsorbable stents. This study presents the modelation of novel auxetic self-expanding stents based in Reentrant and Chiral geometries. They are simulated using Finite Element analysis to determine the presence of negative Poisson's ratios and if they are a possible solution for further stent development. It is concluded that such modelations show low values of Poisson's ratio and may be a viable possibility to obtain a new generation of self-expanding stents.