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    Experimental Verification of the Roles of Intrinsic Matrix Viscoelasticity and Tension-Compression Nonlinearity in the Biphasic Response of Cartilage

    Source: Journal of Biomechanical Engineering:;2003:;volume( 125 ):;issue: 001::page 84
    Author:
    Chun-Yuh Huang
    ,
    Michael A. Soltz
    ,
    Monika Kopacz
    ,
    Van C. Mow
    ,
    Gerard A. Ateshian
    DOI: 10.1115/1.1531656
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A biphasic-CLE-QLV model proposed in our recent study [2001, J. Biomech. Eng., 123 , pp. 410–417] extended the biphasic theory of Mow et al. [1980, J. Biomech. Eng., 102 , pp. 73–84] to include both tension-compression nonlinearity and intrinsic viscoelasticity of the cartilage solid matrix by incorporating it with the conewise linear elasticity (CLE) model [1995, J. Elasticity, 37 , pp. 1–38] and the quasi-linear viscoelasticity (QLV) model [Biomechanics: Its foundations and objectives, Prentice Hall, Englewood Cliffs, 1972]. This model demonstrates that a simultaneous prediction of compression and tension experiments of articular cartilage, under stress-relaxation and dynamic loading, can be achieved when properly taking into account both flow-dependent and flow-independent viscoelastic effects, as well as tension-compression nonlinearity. The objective of this study is to directly test this biphasic-CLE-QLV model against experimental data from unconfined compression stress-relaxation tests at slow and fast strain rates as well as dynamic loading. Twelve full-thickness cartilage cylindrical plugs were harvested from six bovine glenohumeral joints and multiple confined and unconfined compression stress-relaxation tests were performed on each specimen. The material properties of specimens were determined by curve-fitting the experimental results from the confined and unconfined compression stress relaxation tests. The findings of this study demonstrate that the biphasic-CLE-QLV model is able to describe the strain-rate-dependent mechanical behaviors of articular cartilage in unconfined compression as attested by good agreements between experimental and theoretical curvefits (r2=0.966±0.032 for testing at slow strain rate; r2=0.998±0.002 for testing at fast strain rate) and predictions of the dynamic response (r2=0.91±0.06). This experimental study also provides supporting evidence for the hypothesis that both tension-compression nonlinearity and intrinsic viscoelasticity of the solid matrix of cartilage are necessary for modeling the transient and equilibrium responses of this tissue in tension and compression. Furthermore, the biphasic-CLE-QLV model can produce better predictions of the dynamic modulus of cartilage in unconfined dynamic compression than the biphasic-CLE and biphasic poroviscoelastic models, indicating that intrinsic viscoelasticity and tension-compression nonlinearity of articular cartilage may play important roles in the load-support mechanism of cartilage under physiologic loading.
    keyword(s): Stress , Viscoelasticity , Compression , Tension , Cartilage , Equilibrium (Physics) , Relaxation (Physics) , Fittings , Biological tissues , Materials properties AND Testing ,
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      Experimental Verification of the Roles of Intrinsic Matrix Viscoelasticity and Tension-Compression Nonlinearity in the Biphasic Response of Cartilage

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    contributor authorChun-Yuh Huang
    contributor authorMichael A. Soltz
    contributor authorMonika Kopacz
    contributor authorVan C. Mow
    contributor authorGerard A. Ateshian
    date accessioned2017-05-09T00:09:34Z
    date available2017-05-09T00:09:34Z
    date copyrightFebruary, 2003
    date issued2003
    identifier issn0148-0731
    identifier otherJBENDY-26293#84_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/128023
    description abstractA biphasic-CLE-QLV model proposed in our recent study [2001, J. Biomech. Eng., 123 , pp. 410–417] extended the biphasic theory of Mow et al. [1980, J. Biomech. Eng., 102 , pp. 73–84] to include both tension-compression nonlinearity and intrinsic viscoelasticity of the cartilage solid matrix by incorporating it with the conewise linear elasticity (CLE) model [1995, J. Elasticity, 37 , pp. 1–38] and the quasi-linear viscoelasticity (QLV) model [Biomechanics: Its foundations and objectives, Prentice Hall, Englewood Cliffs, 1972]. This model demonstrates that a simultaneous prediction of compression and tension experiments of articular cartilage, under stress-relaxation and dynamic loading, can be achieved when properly taking into account both flow-dependent and flow-independent viscoelastic effects, as well as tension-compression nonlinearity. The objective of this study is to directly test this biphasic-CLE-QLV model against experimental data from unconfined compression stress-relaxation tests at slow and fast strain rates as well as dynamic loading. Twelve full-thickness cartilage cylindrical plugs were harvested from six bovine glenohumeral joints and multiple confined and unconfined compression stress-relaxation tests were performed on each specimen. The material properties of specimens were determined by curve-fitting the experimental results from the confined and unconfined compression stress relaxation tests. The findings of this study demonstrate that the biphasic-CLE-QLV model is able to describe the strain-rate-dependent mechanical behaviors of articular cartilage in unconfined compression as attested by good agreements between experimental and theoretical curvefits (r2=0.966±0.032 for testing at slow strain rate; r2=0.998±0.002 for testing at fast strain rate) and predictions of the dynamic response (r2=0.91±0.06). This experimental study also provides supporting evidence for the hypothesis that both tension-compression nonlinearity and intrinsic viscoelasticity of the solid matrix of cartilage are necessary for modeling the transient and equilibrium responses of this tissue in tension and compression. Furthermore, the biphasic-CLE-QLV model can produce better predictions of the dynamic modulus of cartilage in unconfined dynamic compression than the biphasic-CLE and biphasic poroviscoelastic models, indicating that intrinsic viscoelasticity and tension-compression nonlinearity of articular cartilage may play important roles in the load-support mechanism of cartilage under physiologic loading.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleExperimental Verification of the Roles of Intrinsic Matrix Viscoelasticity and Tension-Compression Nonlinearity in the Biphasic Response of Cartilage
    typeJournal Paper
    journal volume125
    journal issue1
    journal titleJournal of Biomechanical Engineering
    identifier doi10.1115/1.1531656
    journal fristpage84
    journal lastpage93
    identifier eissn1528-8951
    keywordsStress
    keywordsViscoelasticity
    keywordsCompression
    keywordsTension
    keywordsCartilage
    keywordsEquilibrium (Physics)
    keywordsRelaxation (Physics)
    keywordsFittings
    keywordsBiological tissues
    keywordsMaterials properties AND Testing
    treeJournal of Biomechanical Engineering:;2003:;volume( 125 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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