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Numerical validation of a fiber reinforced hyperelastic constitutive model for human intervertebral annulus fibrosus

Lookup NU author(s): Dr Zaoyang Guo

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Abstract

This paper validates a constitutive model for human intervertebral disc annulus fibrosus via numerical simulations on a lumber spine motion segment. This anisotropic hyperelastic fiber-reinforced constitutive model was previously developed by the authors. Based on three-dimensional lumbar spine segments which are constructed from CT scanning images, a detailed and anatomically accurate human lumbar spine finite element model for L3-L4 motion segment is developed. The FE model includes vertebral bodies, intervertebral disc and various ligaments. Numerical simulations are carried out by using commercial CAE software package ABAQUS/Standard. The loading cases considered in the numerical analysis are set to be consistent with sets-up of cadeveric specimen testing available in the literature. Numerical results such as load-displacement curves and nucleus pressure are compared with experimental data. Simulation results show good consistency with cadeveric experimental data, and have good biomechanical fidelity. The constitutive model can be used for human intervertebral disc modeling and biomechanical analysis of human spine column.


Publication metadata

Author(s): Peng XQ, Wang Y, Guo ZY, Shi SQ

Publication type: Article

Publication status: Published

Journal: Journal of Mechanics in Medicine and Biology

Year: 2011

Volume: 11

Issue: 1

Pages: 163-176

ISSN (print): 0219-5194

ISSN (electronic): 1793-6810

Publisher: World Scientific Publishing Co. Pte. Ltd.

URL: http://dx.doi.org/10.1142/S0219519410003691

DOI: 10.1142/S0219519410003691


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