Stress Analysis of the Biopresthetic Heart Valve with Different Thickness

摘要

The stress with different shapes under the same load is analysed and the thickness of the leaflets 0.2mm and 0.4mm is compared by us. We creat the spherical, paraboloidal and ellipsoidal curved surfaces in accordance with geometrical features. The experimental results of the finite element analysis show that stress distribution of the same bioprosthetic heart valve leaflets with different thickness is different. The maximal primary stress with the thickness of 0.4mm is lower than the others.With the same thickness,the stress of the ellipsoidal valve leaflets is lower. This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.