Anisotropic hyperelastic behavior of soft biological tissues

Z.-W. Chen, P. Joli and Z.-Q. Feng

Computer Methods in Biomechanics and Biomedical Engineering, 2015, vol. 18, issue 13, 1436-1444

Abstract: Constitutive laws are fundamental to the studies of the mechanically dominated clinical interventions involving soft biological tissues which show a highly anisotropic hyperelastic mechanical properties. The purpose of this paper was to develop an improved constitutive law based on the Holzapfel–Gasser–Ogden's model: to replace the isotropic part with Gent constitutive law so as to model the noncollagenous matrix of the media due to its generality and capability to reproduce the Neo-Hookean model. This model is implemented into an in-house finite element program. A uniaxial tension test is considered to study the influence of material parameter \[J _{ m }\] Jm in Gent model and \[\beta \] β which represents the angle between the collagen fibers and the circumferential direction. A simulation of an adventitial strip specimen under tension is performed to show the applicability of this constitutive law.

Date: 2015
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DOI: 10.1080/10255842.2014.915082

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