Numerical investigation on effect of leaflet thickness on structural stresses developed in a bileaflet mechanical heart valve for its sustainable manufacturing

Flow induced structural stresses can cause mechanical prosthetic aortic valve to fail due to yielding. In this study, we have performed the structural analysis, especially the effect of leaflet thickness on equivalent stresses developed in a Bileaflet mechanical heart valve (BMHV) due to blood flow...

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Bibliographic Details
Main Authors: Abbas, Syed Samar, Shakir Nasif, Mohammad, Meor Said, Mior Azman, Al-Waked, Rafat, Khalefa Kadhim, Saleem
Format: Conference Proceeding
Language:English
Subjects:
Blood flow
Equivalence
Fluid-structure interaction
Heart valves
Prostheses
Stresses
Structural analysis
Thickness
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Summary:Flow induced structural stresses can cause mechanical prosthetic aortic valve to fail due to yielding. In this study, we have performed the structural analysis, especially the effect of leaflet thickness on equivalent stresses developed in a Bileaflet mechanical heart valve (BMHV) due to blood flow through it has been investigated. The leaflet thickness varies from 0.5mm to 0.7mm, by 0.1mm. A fluid-structure interaction approach based on Arbitrary Lagrangian Eulerian (ALE) technique has been employed with the aid of an user defined function (UDF). Results of the analysis show that high von Mises stresses are developed in BMHV with leaflet thickness of 0.5mm and 0.6mm, being 75% and 13% higher than allowable equivalent stress respectively. Such thinner leaflets are therefore, not sustainable to be replaced with diseased aortic valve.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201713104004