Abstract
Undertaking the 316L stainless steel as a medical stent material and the coronary stent structure as the research object, ANSYS Workbench12.0 is used to simulate the free expansion process of coronary stent by two expansion methods. Finite element analysis is used to solve such problems as deformation behaviour of the stent, mechanical behaviour as well as nonlinear problems of the stent and balloon interaction during the free expansion process. The simulation results show that the stent and balloon interaction process will appear slip phenomenon, the stent shortening in the axial direction and elongating in the radial direction, and that the arc supporting rod location of the stent is the main area of the maximum stress. These can provide a scientific reference for the next new stent design and optimization.
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