NDLI: A transverse isotropic constitutive model for the aortic valve tissue incorporating rate-dependency and fibre dispersion: Application to biaxial deformation

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A transverse isotropic constitutive model for the aortic valve tissue incorporating rate-dependency and fibre dispersion: Application to biaxial deformation

Content Provider	Scilit
Author	Anssari-Benam, Afshin Tseng, Yuan-Tsan Bucchi, Andrea
Copyright Year	2018
Description	Journal: Journal of the mechanical behavior of biomedical materials This paper presents a continuum-based transverse isotropic model incorporating rate-dependency and fibre dispersion, applied to the planar biaxial deformation of aortic valve (AV) specimens under various stretch rates. The rate dependency of the mechanical behaviour of the AV tissue under biaxial deformation, the (pseudo-) invariants of the right Cauchy-Green deformation-rate tensor $Ċassociated with fibre dispersion, and a new fibre orientation density function motivated by fibre kinematics are presented for the first time. It is shown that the model captures the experimentally observed deformation of the specimens, and characterises a shear-thinning behaviour associated with the dissipative (viscous) kinematics of the matrix and the fibres. The application of the model for predicting the deformation behaviour of the AV under physiological rates is illustrated and an example of the predicted σ-λσ-λcurves is presented. While the development of the model was principally motivated by the AV biomechanics requisites, the comprehensive theoretical approach employed in the study renders the model suitable for application to other fibrous soft tissues that possess similar rate-dependent and structural attributes.$
Related Links	https://researchportal.port.ac.uk/portal/files/10545453/Manuscript.pdf
Ending Page	93
Page Count	14
Starting Page	80
ISSN	17516161
e-ISSN	18780180
DOI	10.1016/j.jmbbm.2018.05.035
Journal	Journal of the mechanical behavior of biomedical materials
Volume Number	85
Language	English
Publisher	Elsevier BV
Publisher Date	2018-09-01
Access Restriction	Open
Subject Keyword	Journal: Journal of the mechanical behavior of biomedical materials Biaxial Deformation
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Biomedical Engineering

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