Cyclic loading moves the peak stress to the cartilage surface in a biphasic model with isotropic solid phase properties

Experimental indentation studies of articular cartilage have shown the initiation of fibrillation at the cartilage surface. To date, isotropic biphasic models have failed to support this observation. This study presents the results of applying cyclic loading to an isotropic biphasic cartilage indent...

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Bibliographic Details
Published in:Medical engineering & physics 2004-04, Vol.26 (3), p.247-249
Main Authors: Warner, M.D, Taylor, W.R, Clift, S.E
Format: Article
Language:English
Subjects:
Algorithms
Biomechanical Phenomena
Biphasic
Cartilage failure
Cartilage, Articular - pathology
Compressive Strength
Cyclic loading
Elasticity
Finite element
Finite Element Analysis
Humans
Osteoarthritis - pathology
Osteoarthritis - therapy
Pressure
Stress, Mechanical
Surface Properties
Weight-Bearing
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Summary:Experimental indentation studies of articular cartilage have shown the initiation of fibrillation at the cartilage surface. To date, isotropic biphasic models have failed to support this observation. This study presents the results of applying cyclic loading to an isotropic biphasic cartilage indentation model using an FE based solution procedure. The model incorporated a contact dependent flow algorithm to prevent fluid movement across contacting regions. The results show that under the application of cyclic loading the location of key peak solid phase stresses move from the base of the cartilage layer to the surface and thus to the region of experimentally observed cartilage surface failures.
ISSN:1350-4533
1873-4030
DOI:10.1016/j.medengphy.2003.10.010