Evaluation on Compressive Characteristics of Medical Stents Applied by Mesh Structures

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Hirayama, Kazuki^1 ; He, Jianmei^1

Kogakuin Univ., Dept. of Mechanical Engineering, Nishishinjyuku 1-24-2, Shinjyuku-ku, Tokyo

163-8677, Japan^1

关键词: Analytical results;    Ansys workbenches;    Circumferential direction;    Compressive characteristics;    Compressive stiffness;    Mechanical property evaluation;    Strength reduction;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012075/pdf
DOI  :  10.1088/1757-899X/269/1/012075

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

There are concerns about strength reduction and fatigue fracture due to stress concentration in currently used medical stents. To address these problems, meshed stents applied by mesh structures were interested for achieving long life and high strength perfromance of medical stents. The purpose of this study is to design basic mesh shapes to obatin three dimensional (3D) meshed stent models for mechanical property evaluation. The influence of introduced design variables on compressive characteristics of meshed stent models are evaluated through finite element analysis using ANSYS Workbench code. From the analytical results, the compressive stiffness are changed periodically with compressive directions, average results need to be introduced as the mean value of compressive stiffness of meshed stents. Secondly, compressive flexibility of meshed stents can be improved by increasing the angle proportional to the arm length of the mesh basic shape. By increasing the number of basic mesh shapes arranged in stent's circumferential direction, compressive rigidity of meshed stent tends to be increased. Finaly reducing the mesh line width is found effective to improve compressive flexibility of meshed stents.