School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.
Comput Methods Biomech Biomed Engin. 2023 Jun;26(8):952-959. doi: 10.1080/10255842.2022.2100701. Epub 2022 Jul 20.
The purpose of this investigation was to assess the effects of changing the Nitinol stent's geometrical characteristics on the superelastic behavior of the stent using the finite element method. Four different geometrical parameters were considered and analyzed in sixteen stents. These geometrical parameters consisted of stent length, number of stent's meanders, inside diameter of the stent and wire diameter. Results showed that decreasing either stent length or the number of stent meanders and increasing either the inside diameter of the stent or wire diameter generally result in more sensible superelastic behavior exposure. The effect of changing stent length is independent of the inside diameter and number of the stent's meanders. Effects of changing inside diameter and number of stent's meanders were exactly dependent together. In addition, increasing wire diameter has a great effect on the maximum force. In conclusion, the results of this study may serve as guidelines for future stent design.
本研究旨在通过有限元方法评估改变 Nitinol 支架的几何特征对支架超弹性行为的影响。考虑并分析了 16 个支架中的四个不同的几何参数。这些几何参数包括支架长度、支架曲折的数量、支架的内径和线材直径。结果表明，支架长度的减少或支架曲折数量的减少，以及支架内径或线材直径的增加，通常会导致更敏感的超弹性行为暴露。改变支架长度的影响独立于支架的内径和曲折数量。改变支架内径和曲折数量的影响完全取决于彼此。此外，线材直径的增加对最大力有很大的影响。总之，本研究的结果可为未来的支架设计提供指导。
