Abstract
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 experiments are major methods used to ascertain mechanical properties 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 formulas for the plastic limit pressure vs. the stent’s radius during expansion. Examples covering different geometrical parameters 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.
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The project supported by the National Basic Research Program of China (2005CB623904) and the National Natural Science Foundation of China (10872176).
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Yang, J., Huang, N. Mechanical formula for the plastic limit pressure of stent during expansion. Acta Mech Sin 25, 795–801 (2009). https://doi.org/10.1007/s10409-009-0298-7
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DOI: https://doi.org/10.1007/s10409-009-0298-7