M型Ti-Ni合金血管支架的结构设计对性能的影响

发布时间：2018-06-15 19:50

本文选题：M型血管支架 + 结构设计　；参考：《稀有金属》2017年08期

【摘要】：血管支架的支撑性能及回弹性能是支架在结构设计过程中需要考虑的重要指标。本文选取M型支架节,通过有限元软件模拟,探究M型支架节的高度变化及结构设计波高比(h/H)对支架支撑性能及回弹性能的影响。结果显示:相同h/H比值的M型结构设计,支架高度H值越小,支架支撑力越大;固定高度H值不变,随着h/H比值增大,支架的支撑力减小,且在同一位移载荷下,减小程度随h/H比值增大更显著;当h/H=1时,M型支架转变为Z型支架,此时支架的支撑力最小;不同h/H比值设计的M结构,在不同的位移载荷作用下支架的回弹率区别较大;以h/H=1/2为基准,h/H1/2的支架结构较h/H1/2的支架结构回弹率明显高;在不同的位移载荷作用下,Z型支架较M型支架支撑性能较弱但回弹率稳定。
[Abstract]:The support performance and springback performance of vascular stent are important indexes to be considered in the process of structural design. In this paper, M-type bracket is selected and simulated by finite element software to explore the influence of height change of M-shaped bracket and the effect of wave height ratio (H / H) on the support performance and springback performance of the bracket. The results show that the lower the support height H is, the greater the support force is in the design of M-type structure with the same H / H ratio, the fixed height H value is constant, and the supporting force decreases with the increase of H / H ratio, and under the same displacement load, the support force decreases with the increase of H / H ratio. When H / H = 1, the support force of the support is the smallest, and the springback rate of the M structure with different H / H ratio is different under different displacement loads. On the basis of h / H / 1 / 2, the support structure of H / H / H 1 / 2 is more resilient than that of H / H 1 / 2, and the support performance of Z type bracket is weaker than that of M type bracket under different displacement loads, but the springback rate is stable.
【作者单位】：北京有色金属研究总院有研亿金新材料有限公司;
【基金】：国家自然科学基金项目(51401027)资助
【分类号】：R318.08;TG146.23

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