The functionally grading elastic and viscoelastic properties of the body region of the knee meniscus

Maritz, Jared, Agustoni, Greta, Dragnevski, Kalin, Bordas, Stéphane P. A. ORCID: https://orcid.org/0000-0001-8634-7002 and Barrera, Olga 2021. The functionally grading elastic and viscoelastic properties of the body region of the knee meniscus. Annals of Biomedical Engineering 49 , pp. 2421-2429. 10.1007/s10439-021-02792-1

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Abstract

The knee meniscus is a highly porous structure which exhibits a grading architecture through the depth of the tissue. The superficial layers on both femoral and tibial sides are constituted by a fine mesh of randomly distributed collagen fibers while the internal layer is constituted by a network of collagen channels of a mean size of 22.14 μm aligned at a 30∘ inclination with respect to the vertical. Horizontal dog-bone samples extracted from different depths of the tissue were mechanically tested in uniaxial tension to examine the variation of elastic and viscoelastic properties across the meniscus. The tests show that a random alignment of the collagen fibers in the superficial layers leads to stiffer mechanical responses (E = 105 and 189 MPa) in comparison to the internal regions (E = 34 MPa). All regions exhibit two modes of relaxation at a constant strain (τ1=6.4 to 7.7 s, τ2 = 49.9 to 59.7 s).

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License
Publisher:	Springer
ISSN:	0090-6964
Date of First Compliant Deposit:	18 June 2021
Date of Acceptance:	5 May 2021
Last Modified:	04 May 2023 06:44
URI:	https://orca.cardiff.ac.uk/id/eprint/141963

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