FATIGUE PERFORMANCE ANALYSIS OF VASCULAR STENT BASED ON TWO-WAY FLUID-SOLID COUPLING (MT)

YANG Hang; MUHETAER KeLiMu; WU Chuan; YANG HaiKun

doi:10.16579/j.issn.1001.9669.2022.06.026

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FATIGUE PERFORMANCE ANALYSIS OF VASCULAR STENT BASED ON TWO-WAY FLUID-SOLID COUPLING (MT)

更新时间：2023-06-09

- FATIGUE PERFORMANCE ANALYSIS OF VASCULAR STENT BASED ON TWO-WAY FLUID-SOLID COUPLING (MT)
- Journal of Mechanical Strength Issue 6, Pages: 1461-1468(2022)
- 作者机构：
  
  1. 新疆大学机械工程学院
  2. 塔里木大学信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2022.06.026
  CLC：
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YANG Hang, MUHETAER KeLiMu, WU Chuan, et al. FATIGUE PERFORMANCE ANALYSIS OF VASCULAR STENT BASED ON TWO-WAY FLUID-SOLID COUPLING (MT). [J]. Journal of Mechanical Strength (6):1461-1468(2022)
DOI：

YANG Hang, MUHETAER KeLiMu, WU Chuan, et al. FATIGUE PERFORMANCE ANALYSIS OF VASCULAR STENT BASED ON TWO-WAY FLUID-SOLID COUPLING (MT). [J]. Journal of Mechanical Strength (6):1461-1468(2022) DOI： 10.16579/j.issn.1001.9669.2022.06.026.

摘要

为了评估支架厚度对植入血管后疲劳强度的影响，建立血管、支架与血液三者的双向流-固耦合模型，通过有限元分析计算方法，采用Ansys软件模拟分析支架植入过程中及植入后的疲劳行为，实现了结构固体力学分析与流体动力学分析的耦合计算，得到了支架在一个血液脉动载荷作用下的数值结果。根据模拟结果，通过Goodman准则与动态安全因数对植入后的支架进行疲劳性能评估。结果显示，血液的多组分性对支架的应力波动影响较大；支架的厚度对于支架应力分布几乎不产生影响，但是对疲劳性能影响较大。

Abstract

In order to evaluate the influence of the thickness of the stent on the fatigue strength after implantation of the blood vessel, we established a two-way fluid-solid coupling model of the blood vessel、stent and the blood in this paper. The ANSYS finite analysis software was used in this paper to simulative analysis the fatigue performance of stent after implantation, the coupling calculation of structural solid mechanics analysis and fluid dynamics analysis is realized, and the numerical results of the stent under a blood pulsating load are obtained. According to the simulation results, the fatigue performance of the implanted stent is evaluated by Goodman criterion and dynamic safety factor. The results show that the multi-component nature of blood has a greater impact on the stress fluctuation of the stent; the thickness of the stent has almost no effect on the stress distribution of the stent, but has a greater impact on the fatigue performance.

关键词

有限元流-固耦合疲劳Goodman准则动态安全系数

Keywords

Finite elementFluid-solid couplingFatigueGoodman criterionDynamic safety factor

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