| Summary: | 碩士 === 國立臺北科技大學 === 機電整合研究所 === 97 === This thesis uses the finite-element-analysis software to investigate the mechanical behavior, such as maximum stress, radial deformation, axial deformation, foreshortening, dogboning, flexibility, and fatigue life, of expanded coronary stents with different thickness of cells and links. This thesis also makes a study of the mechanical behavior of stents with different bolloon-expanding pressures. The simulation results show that, during the reduction of link thickness, the location of the maximum stress will transfer from radial links to axial links and its value becomes smaller. Therefore, if the link thickness is properly reduced, the stent can properly expand and the maximum stress lowers in value. The reduction of link thickness can also improve the flexibility and the fatigue life of the stents and decrease the surface contact area between the expanded metal stent and vascular wall. As a result, the possibility of coronary occlusion after the stent is implanted may become less.
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