Finite Element Analysis for Compression and Expansion Behavior of Magnesium Stent
10.3969/j.issn.1671-7104.2014.03.001
- VernacularTitle:有限元技术的镁合金支架紧缩膨胀行为的分析
- Author:
Hongliang CHEN
1
;
Xiangkun LIU
;
Guangyin YUAN
;
Linlin ZHANG
;
Zhonghua LI
;
Qiyi LUO
;
Feng LIN
Author Information
1. 上海交通大学轻合金精密成型国家工程研究中心
- Keywords:
magnesium stent;
crimp;
expansion;
mechanical properties;
finite element analysis
- From:
Chinese Journal of Medical Instrumentation
2014;(3):161-164,176
- CountryChina
- Language:Chinese
-
Abstract:
Magnesium stents have gained increasing interest as an ideal stent of future intervention. In order to study the deformation behavior of magnesium al oy stents in the interventional treatment, the finite element method was used to analysis the effects of different crimp and expansion dimensions on the mechanical properties (maximum stress, radial recoil rate, longitudinal shortening rate and radial strength). The results showed that crimping and expanding have a minimal influence on the stent radial strength. When the expansion size is same, the maximum equivalent stress and recoil rate decrease with the crimp size. When the crimp size is same, in contrast with the radial recoil rate, the maximum equivalent stress and longitudinal shortening rate increase with the expansion size. In addition the paper verified the radial strength-radial displacement curve obtained by FEM. Results are basical y consistent, indicating the finite element method can efficiently provide researchers with reliable, high-quality design.
