冠脉支架膨胀过程的有限元模拟

摘要

在研究确定了冠脉支架的几何模型、有限元模型、材料模型、边界条件、求解控制的基础上,利用有限元法对冠脉支架的膨胀过程进行了模拟分析,并对分析结果进行了实验验证.结果表明,利用有限元法建立的力学模型可以在不考虑球囊和血管作用的情况下,较好地模拟和分析冠脉支架的实际膨胀过程.通过该方法设计制造的冠脉支架长度缩短率和狗骨头率分别达到1.31%和3.66%,与有限元分析结果吻合良好.该方法可为新型结构冠脉支架的优化设计提供依据.%Based on the research of geometry model, finite element model, material model, boundary conditions and solution control of coronary stent, coronary stent expansion process simulation analysis is made using finite element method, and experimentally validated to the analysis results. It shows that the mechanics model by finite element method can simulate and analyze the real expansion process of coronary stent well under the condition of ignoring the action between sacculus and blood vessel. The coronary stent expansion rate and dog bone rate made by this method reaches 1. 31% and 3. 66% respectively, which meets the analysis results very welL So this method provides technical basis for new construction coronary stent