王越彤, 冯海全, 王晓天, 王永刚. 两种工况下8种腔静脉滤器疲劳强度的对比研究[J]. 工程力学, 2020, 37(9): 230-239. DOI: 10.6052/j.issn.1000-4750.2019.10.0590
引用本文: 王越彤, 冯海全, 王晓天, 王永刚. 两种工况下8种腔静脉滤器疲劳强度的对比研究[J]. 工程力学, 2020, 37(9): 230-239. DOI: 10.6052/j.issn.1000-4750.2019.10.0590
WANG Yue-tong, FENG Hai-quan, WANG Xiao-tian, WANG Yong-gang. COMPARATIVE STUDY ON FATIGUE STRENGTH OF 8 KINDS OF VENA CAVA FILTERS UNDER TWO WORKING CONDITIONS[J]. Engineering Mechanics, 2020, 37(9): 230-239. DOI: 10.6052/j.issn.1000-4750.2019.10.0590
Citation: WANG Yue-tong, FENG Hai-quan, WANG Xiao-tian, WANG Yong-gang. COMPARATIVE STUDY ON FATIGUE STRENGTH OF 8 KINDS OF VENA CAVA FILTERS UNDER TWO WORKING CONDITIONS[J]. Engineering Mechanics, 2020, 37(9): 230-239. DOI: 10.6052/j.issn.1000-4750.2019.10.0590

两种工况下8种腔静脉滤器疲劳强度的对比研究

COMPARATIVE STUDY ON FATIGUE STRENGTH OF 8 KINDS OF VENA CAVA FILTERS UNDER TWO WORKING CONDITIONS

  • 摘要: 为探索腔静脉滤器疲劳失效的原因,有必要研究滤器受到周期循环变载荷作用下的疲劳强度。应用SolidWorks软件建立8种腔静脉滤器的模型,应用有限元软件ABAQUS模拟分析8种滤器在周向脉动循环载荷和径向压缩循环载荷下的疲劳强度,并实验验证其中1种滤器的安全性。在周向疲劳分析中,8种滤器所有单元的交变应变点均处于疲劳极限曲线下方,且安全系数均大于1,满足疲劳寿命要求;在径向疲劳分析中,新型滤器和TrapEase滤器的部分单元的交变应变点位于疲劳极限曲线的上方,且安全系数均小于1,其余6种滤器均满足疲劳寿命要求。可回收滤器不一定满足10年的疲劳寿命要求,可作为临时滤器使用。通过14 d、21 d和28 d的动物实验,对3头小香猪置入Aegisy滤器,综合评价了滤器的安全性,该结果为腔静脉滤器的设计研发和临床应用提供良好的参考依据。

     

    Abstract: In order to explore the reasons of fatigue failure of vena cava filters, it is necessary to study the fatigue strength of the filter under cyclic variable loads. SolidWorks software was used to build models of 8 filters, ABAQUS software was used to analyze the fatigue strength of 8 filters under circumferential pulsating cyclic load and radial compression cyclic load, and the safety of one filter was verified by experiments. In the circumferential fatigue analysis, all the alternating strain points of 8 filters are below the fatigue limit curve, and the safety factors are greater than 1, which meet the fatigue life requirements. In the radial fatigue analysis, some alternating strain points of the new filter and the TrapEase filter are above the fatigue limit curve, and the safety factors are less than 1. The other 6 filters meet the fatigue life requirements. The recyclable filter may not meet the requirement of fatigue life of 10 years and can be used as a temporary filter. Through 14 days, 21 days and 28 days of animal experiments, three small sweetgum pigs were implanted with Aegisy filter. The safety of Aegisy filter is comprehensively evaluated. The results show a good reference for the design, development and clinical application of vena cava filters.

     

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