Constitutive Model of Passive Myocardium of Lamb

Soltani, Navid; Nasiraei Moghaddam, Abbas; Faturaee, Nasser; Seyri, Saeed; Rassoli, Aisa

doi:10.22041/ijbme.2014.14704

Constitutive Model of Passive Myocardium of Lamb

Document Type : Full Research Paper

Authors

Navid Soltani ¹

Abbas Nasiraei Moghaddam ²

Nasser Faturaee ³

Saeed Seyri ¹

Aisa Rassoli ⁴

¹ M. Sc Student, Biomechanics Department, Faculty of Biomedical Engineering, Amirkabir University of Technology,Tehran, Iran

² Assistant Professor, Bioelectric Department, Faculty of Biomedical Engineering, Amirkabir University of Technology,Tehran, Iran

³ Associate Professor, Biomechanics Department, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran

⁴ Ph.D Student, Biomechanics Department, Faculty of Biomedical Engineering, Amirkabir University of Technology,Tehran, Iran

https://doi.org/10.22041/ijbme.2014.14704

Abstract

Experimental tests and equations on the continuum mechanics are used in order to obtain the constitutive models of soft tissue using in predictive heart simulation. Considering the myocardium as one of the important tissues, in this paper first the morphology and structure of myocardium has been reviewed and the mechanical response of passive form of this tissue has been investigated. The myocardium of left ventricle was considered as non linear elastic, in-compressible and non homogeneous material and using of bi-axial test in 3 lambs myocardium on fiber direction; a constitutive model of this tissue has been proposed. The model so constructed is then evaluated against the biaxial data, and values of the material constants have been obtained by curve fitting so the final model states the strain-energy function as cauchy's invariants which can be helpful in heart simulation.

Keywords

ventricular wall

continuum mechanics

strain energy tensor

local kinematics

bi-axial test

Subjects

Cardiovascular Biomechanics

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