An Investigation on Strength of SS316L and Cobalt- Chromium used as cardio Vascular Stent materials by nonlinear FEA

摘要

Aim of this study is to provide a computationaludapproach for evaluating the effect of Stents onudbiomechanical outcome of deployment of stent inuddifferent condition. Nonlinear FEA software has beenudused successfully on balloon expandable stents.udProjects often require modelling systems that consist ofudmultiple components with nonlinear materials, complexud3D geometries. The ABACUS, handles the full range ofudnonlinear material properties for the stent, the catheterudballoon, and the artery wall. The objective of research carried out was to simulate the mechanical behaviour of the stent using finite element analysis. Implantation and in vivo loading are considered. Finite element analysisudprovides a quick and cost-effective method forudevaluating stent performance, yielding accurateudinformation about the expanded geometry and theudstress and strain deformation fields with in the stent for various loading conditions. With appropriate applied internal pressure, the balloon inside the stent is deployed which linearlyexpands the diameter of a Modular Stent until it reaches 1.7 times of its original diameter. The results will assist in the development of novel stent designs and stent deployment to minimize vascular injury during stenting and reduce restenosis.udThe results obtained for the selected stent material are compared. The Cobalt-chromium undergone plastic deformation at 0.44 MPa and SS316L at 0.3 MPa pressure load.