Finite element model and computational fluid dynamic analysis of hyperelastic Ti-Ni alloy stent

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Vascular Ti-Ni alloy stent which has the special shape memory and superelastic was analyzed about the effect on interaction with plaque and vessels and blood flow using finite element method (FEM) with COSMOS Works and computational fluid dynamics (CFD) with COSMOS FloWorks. The results showed that COSMOS could exactly simulate the hyperelasticity of Ti-Ni alloy stent; shape memory could cause great compliance of vessels but not easily damage vascular wall; the hyperelasticity might cause stronger supporting force to properly shorten length of supporting tendon so as to increase the supporting force of the stent; the compliance was beneficial for blood circulation and decrease incidence of vascular restenosis.

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