Geometrical stress reducing factors in the anisotropic porcine heart valves

Luo, X.Y. , Li, W.G. and Li, J. (2003) Geometrical stress reducing factors in the anisotropic porcine heart valves. Journal of Biomechanical Engineering, 125(5), pp. 735-744. (doi:10.1115/1.1614821)

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Abstract

This study carries out a detailed parameter study based on a nonlinear anisotropic finite-element model published previously. The aim of this study is to identify the stress-reducing influences from geometrical parameters such as stent height, valve diameter, and the nonuniform thickness of porcine aortic valves under static loading condition. The anisotropy of the valve is considered to be transversely isotropic with fibers oriented along the circumferential directions, which enables us to use a simple anisotropic constitutive model using uniaxial experimental data. The results showed that in general, higher stent height and smaller diameter combined with nonuniform thickness give rise to a much more reduced overall stress level. Although the absolute values of the peak stresses may be influenced by the detailed orientations of fibers, the trends of the stress variation with the geometrical factors seem to be qualitatively consistent within the parameter ranges considered.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Luo, Professor Xiaoyu and Li, Dr Wenguang
Authors: Luo, X.Y., Li, W.G., and Li, J.
Subjects:Q Science > QA Mathematics
College/School:College of Science and Engineering > School of Mathematics and Statistics
Journal Name:Journal of Biomechanical Engineering
ISSN:0148-0731

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