Determination of Poisson’s Ratio of Articular Cartilage by Indentation Using Different-Sized Indenters

[+] Author and Article Information
Hui Jin, Jack L. Lewis

Department of Orthopaedic Surgery, University of Minnesota

J Biomech Eng 126(2), 138-145 (May 04, 2004) (8 pages) doi:10.1115/1.1688772 History: Received February 19, 2003; Revised September 26, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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Finite element mesh for the axisymmetric indentation problem
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Experimental strain-stress curves for polyurethane rubber in unconfined compression
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Load-depth curves for polyurethane rubber indentation
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Load-depth curves for bovine cartilage indentation during rapid loading (instantaneous response)
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Load relaxation functions for two different specimens observed in bovine cartilage indentation tests. Relaxation response generally was of two types, either variable (a) or very similar (b).
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Poisson’s ratio prediction from the indentation stiffness obtained from FE simulations of the homogeneous isotropic elastic model and use of Eq. (2)




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