中文摘要：

心血管的 stents 的力学为 stent 功能和安全在扩大的过程期间是很重要的。一般来说，有限元素方法(女性) 或实验是过去常查明 stent 的机械性质的主要方法。在这篇论文，我们开发管状的 stent 的一个理论模型，在 stent 结束为轴的力量和时刻导出公式，并且建议为塑料的公式限制在扩大期间的压力对 stent 的半径。盖住不同几何参数和材料参数的例子被提供，并且塑料限制压力计算了由女性并且现在的方法被比较，证明现在的公式为 stent 的设计和革新可接受、有意义。

英文摘要：

The mechanics of cardiovascular stents during the process of expansion are very important for stent function and safety. In general, finite element method （FEM） or experi- ments are major methods used to ascertain mechanical prop- erties of the stent. In this paper, we develop a theoretical model of the tubular stent, derive formulas for the axial forces and moments on the stent end, and propose formu- las for the plastic limit pressure vs. the stent＇s radius during expansion. Examples covering different geometrical param- eters and material parameters are provided, and the plastic limit pressures calculated by FEM and the present method are compared, proving that the present formulas are acceptable and meaningful for the design and innovation of the stent.