| Popis: |
Considerable research has been devoted to the design, optimization, and development of bio-stents in the last few decades. This paper reviews many existing stents and suggests an optimized structure of stent that satisfies all constraint functions including stress generation in the artery since the arteries also have some limitation in enduring stresses both in longitudinal and circumferential directions. The best stent structure among the seven optimized stents reported in the literature, based on the combined behavior of the artery and the stent-like foreshortening and elastic radial recoil, is suggested. A unit cell of the stent is considered along with a cylindrical artery to reduce the computational time. The finite element method is used to determine the mechanical integrity of the stents at various load conditions during and after its deployment. The stent is also analyzed for two different materials, stainless steel and Nitinol, that are used for stent manufacturing and the results are reported. |
