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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:功能材料

Affiliation of Author(s):材料科学与工程学院

Issue:4

Page Number:4023-4027

ISSN No.:1001-9731

Abstract:The significant compression before implantation and pulsating load process of the super-elastic nitinol stent have important impacts on its security application.Significant compression can result in substantial strain in local area of the stent,and when the strain exceeds the strain limit of the material,the permanent deforma-tion will occur.While in service,the stent will receive a periodic pulsating compressive load,and undergo fa-tigue cycles.Regarding the big band Z-stent,in this paper,we make use of the finite element method to analyze the influence of V-type connector radius and the length of the support strut of stent on its compression and pul-sation cycle.The results showed that during the implantation and pulsating process,V-type connector is com-pressed inside and stretched outside;increasing the length of the support strut and the arc radius will reduce the compressive strain and increase fatigue resistance.Moreover,to evaluate the safety of the stent,it needs to ana-lyze not only the long-term fatigue resistance,but also the significant compression deformation before implanta-tion.

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