Design and Analysis of Balloon-expandable Stainless Steel Coronary Stent

Abstract

This thesis uses “Volume Control” ballon-stent model, and according to results of deformation of a stent and vascular during implantation, we obtain the stress contours of the stent during implantation. The results conclude by ANSYS simulation show that during the implantation process, expansion of balloon body will make the narrow part of the blood wall fragment tough. After placement of the stent, due to blood flow in vessel makes that the inner wall of blood vessels has uneven distribution of shear stress; And, in the vicinity of the stent structure, it has a lower [7] shear stress to vessel wall. During the expansion of the stent, the maximum principal stress concentrate on the connection between coronary stent itself and stiffeners.