逆式组合结构镍钛血管支架的径向支撑性能有限元研究

doi:10.11896/cldb.18100067

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Abstract Radial supporting performance is the important indicator that should be taken into account in the design process of vascular stents. In this research, the influence of wire diameter, height of main crest, number of unit, circumferential length ratio, height ratio on radial supporting performance and stability of two different stents during work process was explored through finite element simulation. The results showed that the maximum principle strain appeared at the corner piece of the main crest during work process, indicating that this was the risk point of failure. The wire diameter had the largest influence on radial supporting performance, followed by height of main crest, while other factors had less influence. The increase of wire diameter and number of unit reduced the stability of radial supporting performance during work process, while other factors had no obvious influence. The radial supporting performance of both structures was improved with the wire diameter increasing. And the radial supporting performance of cis-structure was not changed while that of trans-structure was decreased with other four facors increasing. Under the effect of various factors, the radial supporting performance of trans-structure was always superior to that of cis-structure.

Key words： Ti-Ni alloy vascular stent radial supporting performance finite element

Published: 31 July 2019

CLC number:

TG146.3

Fund:This work was financially supported by the Beijing Municipal Science and Technology Project (Z161100000116010).

About author:: Guohang Zhaois studying for a master’s degree in General Research Institute for Nonferrous Metals,focusing on TiNi memory alloy stent.
Zhishan Yuanreceived his Ph.D. degree in materials from Northeastern University in 2007. He is senior engineer in General Research Institute for Nonferrous Me-tals and participates in the development of TiNi alloy and shape memory alloy.

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	ZHAO Guohang
	CHEN Gui
	LI Xinghui
	YUAN Zhishan
	MA Liancai
	ZHANG Baoxiang

Cite this article:

ZHAO Guohang,CHEN Gui,LI Xinghui, et al. Finite Element Studies on Radial Supporting Performance of Trans-structure Ni-Ti Alloy Vascular Stent[J]. Materials Reports, 2019, 33(18): 3050-3056.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.18100067 OR http://www.mater-rep.com/EN/Y2019/V33/I18/3050

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