In vitro technique in estimation of passive mechanical properties of bovine heart

Abstract A pseudo-elastic constitutive equation describing the mechanical properties of bovine myocardium was developed. The myocardium was modeled as a hyperelastic transversely isotropic material with a minimum viscoelastic loses. The material parameters for the proposed constitutive equations wer...

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Bibliographic Details
Published in:	Medical engineering & physics Vol. 31; no. 1; pp. 83 - 91
Main Authors:	Ghaemi, Hamid, Behdinan, K, Spence, A.D
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 2009
Subjects:	Bio-membrane theory Constitutive modeling Finite element Myocardium Radiology Myocardium Constitutive modeling Finite element Bio-membrane theory
Online Access:	Get full text
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Summary:	Abstract A pseudo-elastic constitutive equation describing the mechanical properties of bovine myocardium was developed. The myocardium was modeled as a hyperelastic transversely isotropic material with a minimum viscoelastic loses. The material parameters for the proposed constitutive equations were determined using GA regression technique. In this work, the development of a constitutive equation based on principal stretch ratios is explained. The predictive capability of proposed model was compared against the experimental data obtained from part one. Finally, the constitutive equations were implemented into a commercial finite element program and the results of the mathematical model and FEM were compared with the experimental data.
ISSN:	1350-4533 1873-4030
DOI:	10.1016/j.medengphy.2008.04.009