| 球囊扩张式冠脉支架耦合扩张变形机理研究 |
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| 引用本文： | 郭飞飞,冯海全,江旭东,韩青松. 球囊扩张式冠脉支架耦合扩张变形机理研究[J]. 机械设计与研究, 2012, 28(3): 30-33,37. DOI: 10.13952/j.cnki.jofmdr.a2863 |
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| 作者姓名： | 郭飞飞 冯海全 江旭东 韩青松 |
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| 作者单位： | 内蒙古工业大学机械学院; |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 完整的支架耦合扩张过程包括压握收缩、自由扩张和与动脉血管壁的综合作用过程。文中在不考虑血管内斑块的情况下,利用有限元方法(FEM)分析了两种材料(SUS-316L、CoCr-L605)的支架动静态连续变形过程,重点研究了支架受到脉流载荷时的作用机制。通过设定接触,边界条件和载荷等关键条件控制求解过程,比较了它们在几何变形、应力分布等方面的差异性,并利用轴向缩短率、径向回弹率、静态强度和疲劳强度等指标定量预测两种支架的生物力学性能。有限元模拟对支架的设计及其性能的评价有一定指导意义。
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| 关 键 词： | 冠脉支架 耦合扩张 有限元方法 疲劳强度 |
Research on the Coupling Expansion Mechanism of Balloon-expandable Coronary Stent |
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| GUO Fei-fei , FENG Hai-quan , JIANG Xu-dong , HAN Qing-song. Research on the Coupling Expansion Mechanism of Balloon-expandable Coronary Stent[J]. Machine Design and Research, 2012, 28(3): 30-33,37. DOI: 10.13952/j.cnki.jofmdr.a2863 |
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| Authors: | GUO Fei-fei FENG Hai-quan JIANG Xu-dong HAN Qing-song |
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| Affiliation: | 3(Mechanical Engineering College,Inner Mongolia University of Technology,Huhehaote 010051,China) |
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| Abstract: | The complete coupling expansion of stents includes constriction,free expansion and interactions with the artery vessel.This paper has used finite element method analyzing the static and dynamic continuous deformation process of stents with two kinds of materials(stainless steel-316L,CoCr alloy-L605) without considering plaque in vessel and studying the mechanism under periodic loading,especially.The key factors such as interaction,boundary conditions and loads are set to control the solution.The differences in geometry deformation and stress distribution were compared,and the stents biomechanical properties are quantitatively predicated with the indexas of axial shortening,radial elongation,static strength and fatigue strength.FEM can conduct the stent design and evaluate its perfonnance. |
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| Keywords: | coronary stents coupling expansion finite element method fatigue strength |
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