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Influence of Crimping on the Performances of Balloon Expandable Stents |
WANG Ming, MA Quan-Chao, ZHANG Wen-Guang, LUO Yun |
(School of Mechanical Engineering, State Key Lab. of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Plastic deformation and work hardening may occur in crimping, which can result in changes of material properties and affect the performance of stents. A complete deformation procedure of a typical stent was simulated using finite element method. Its mechanical performances were evaluated and compared with that using a simplified procedure (omitting the process of stent crimping). It was found that the crimping has a significant influence on the stent shape, stress distribution, recoil rate and the maximum expandable diameter of stent.
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Received: 05 August 2011
Published: 28 April 2012
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