Numerical analysis of crimping and inflation process of balloon-expandable coronary stent using implicit solution
Numerical analysis of crimping and inflation process of balloon-expandable coronary stent using implicit solution
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DOI：
10.1002/cnm.2890
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发表时间：
2017-12-01
影响因子：
2.1
通讯作者：
Malachowski, Jerzy
中科院分区：
文献类型：
--
作者：
Bukala, Jakub;Kwiatkowski, Piotr;Malachowski, Jerzy
本文介绍了一种应用方法，用于冠状动脉支架卷曲和使用折叠非顺应性血管成形术球囊的自由膨胀过程的数值有限元分析。隐式格式的使用被认为是最原始的工作部分，作为一个显式的有限元程序往往是首选。目前，当隐式解用于有限元求解时，模拟问题得到了很大的简化。因此，作者将重点放在尽可能简化的建模方法上，即全载荷路径（单一分析中的压缩和膨胀）、固体单元离散化和复杂的接触模型（刚度差异很大的物体）。所得结果与实验数据（压接过程中的径向力）进行了部分比较，并呈现出令人满意的顺应性。作者认为，所提出的方法允许显着改善所获得的结果，以及潜在的扩展的研究范围，相比以前的努力，使用显式集成计划。此外，所提出的方法被认为是适合的灵敏度和优化研究。
The paper presents an applied methodology for numerical finite element analysis of coronary stent crimping and the free inflation process with the use of a folded noncompliant angioplasty balloon. The use of an implicit scheme is considered as the most original part of the work, as an explicit finite element procedure is very often preferred. Hitherto, when the implicit solution was used for the finite element solution, the simulated issue was largely simplified. Therefore, the authors focused on the modelling methodology with minimum possible simplification, ie, a full load path (compression and inflation in single analysis), solid element discretization, and sophisticated contact models (bodies with highly different stiffness). The obtained results are partially compared with experimental data (radial force during the crimping procedure) and present satisfactory compliance. The authors believe that presented methodology allow for significant improvement of the obtained results, as well as potential extension of the research scope, compared to previous efforts performed using the explicit integration scheme. Moreover, the presented methodology is believed to be suitable for sensitivity and optimization studies.