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An anisotropic multiphysics damage model with application to annulus fibrosus

Content Provider	Scilit
Author	Gao, Xin Zhu, Qiaoqiao Gu, Weiyong
Copyright Year	2017
Description	Journal: Journal of biomechanics An anisotropic multiphysics damage model is developed to characterize the couplings among multiple physical fields within soft tissues and the tissue damage based on thermodynamic principles. This anisotropic multiphysics damage model integrates the continuum mixture theory and a continuum damage model, and the anisotropic damage is considered by evolution of internal damage variables governing the anisotropic mechanical behaviors of tissues. The energy dissipation associated with the transport of fluid and ions is generally related to tissue damage. The anisotropic multiphysics damage model is applied to simulate a case of annulus fibrosus (AF) damage in an isolated intervertebral disc under compression, to understand the damage initiation and propagation. It is found that, for this case (with 1000N/s of compression rate and neglected ground matrix damage), the damage initiated in the outer and middle posterior regions of AF at about 700N of axial compression. The region-dependent yield stretch ratio predicted by this model is consistent with experimental findings. A sensitive study on the damage parameters is also presented. This study provides an additional insight into AF damage in the isolated disc under mechanical compression.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5581220/pdf
Ending Page	93
Page Count	6
Starting Page	88
ISSN	00219290
e-ISSN	18732380
DOI	10.1016/j.jbiomech.2017.07.007
Journal	Journal of biomechanics
Volume Number	61
Language	English
Publisher	Elsevier BV
Publisher Date	2017-08-01
Access Restriction	Open
Subject Keyword	Journal: Journal of biomechanics Interdisciplinary Mathematics Continuum Damage Finite Element Analysis Intervertebral Disc Multiple Physical Fields
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science Biomedical Engineering

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