This study investigated the ability of the linear biphasic poroelastic (BPE) model and the linear biphasic poroviscoelastic (BPVE) model to simultaneously predict the reaction force and lateral displacement exhibited by articular cartilage during stress relaxation in unconfined compression. Both models consider articular cartilage as a binary mixture of a porous incompressible solid phase and an incompressible inviscid fluid phase. The BPE model assumes the solid phase is elastic, while the BPVE model assumes the solid phase is viscoelastic. In addition, the efficacy of two additional models was also examined, i.e., the transversely isotropic BPE (TIBPE) model, which considers transverse isotropy of the solid matrix within the framework of the linear BPE model assumptions, and a linear viscoelastic solid (LVE) model, which assumes that the viscoelastic behavior of articular cartilage is solely governed by the intrinsic viscoelastic nature of the solid matrix, independent of the interstitial fluid flow. It was found that the BPE model was able to accurately account for the lateral displacement, but unable to fit the short-term reaction force data of all specimens tested. The TIBPE model was able to account for either the lateral displacement or the reaction force, but not both simultaneously. The LVE model was able to account for the complete reaction force, but unable to fit the lateral displacement measured experimentally. The BPVE model was able to completely account for both lateral displacement and reaction force for all specimens tested. These results suggest that both the fluid flow-dependent and fluid flow-independent viscoelastic mechanisms are essential for a complete simulation of the viscoelastic phenomena of articular cartilage.
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April 2001
Technical Papers
Biphasic Poroviscoelastic Simulation of the Unconfined Compression of Articular Cartilage: I—Simultaneous Prediction of Reaction Force and Lateral Displacement
Mark R. DiSilvestro,
Mark R. DiSilvestro
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
11
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Qiliang Zhu,
Qiliang Zhu
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
11
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Marcy Wong,
Marcy Wong
M.E. Mu¨ller Institute for Biomechanics, University of Bern, Bern, Switzerland
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Jukka S. Jurvelin,
Jukka S. Jurvelin
Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland
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Jun-Kyo Francis Suh
Jun-Kyo Francis Suh
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
22
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Mark R. DiSilvestro
11
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
Qiliang Zhu
11
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
Marcy Wong
M.E. Mu¨ller Institute for Biomechanics, University of Bern, Bern, Switzerland
Jukka S. Jurvelin
Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland
Jun-Kyo Francis Suh
22
Department of Biomedical Engineering, Tulane University, New Orleans, LA 70118
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division Dec. 1999; revised manuscript received Oct. 2000. Associate Editor: J. D. Humphrey.
J Biomech Eng. Apr 2001, 123(2): 191-197 (7 pages)
Published Online: October 1, 2000
Article history
Received:
December 1, 1999
Revised:
October 1, 2000
Citation
DiSilvestro, M. R., Zhu, Q., Wong, M., Jurvelin, J. S., and Suh, J. F. (October 1, 2000). "Biphasic Poroviscoelastic Simulation of the Unconfined Compression of Articular Cartilage: I—Simultaneous Prediction of Reaction Force and Lateral Displacement ." ASME. J Biomech Eng. April 2001; 123(2): 191–197. https://doi.org/10.1115/1.1351890
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