Mengoni, M orcid.org/0000-0003-0986-2769, Jones, AC orcid.org/0000-0002-4984-7507 and Wilcox, RK orcid.org/0000-0003-2736-7104 (2016) Modelling the failure precursor mechanism of lamellar fibrous tissues, example of the annulus fibrosus. Journal of the Mechanical Behavior of Biomedical Materials, 63. pp. 265-272. ISSN 1751-6161
Abstract
The aims of this study were to assess the damage and failure strengths of lamellar fibrous tissues, such as the anterior annulus fibrosus (AF), and to develop a mathematical model of damage propagation of the lamellae and inter-lamellar connections. This level of modelling is needed to accurately predict the effect of damage and failure induced by trauma or clinical interventions. 26 ovine anterior AF cuboid specimens from 11 lumbar intervertebral discs were tested in radial tension and mechanical parameters defining damage and failure were extracted from the in-vitro data. Equivalent 1D analytical models were developed to represent the specimen strength and the damage propagation, accounting for the specimen dimensions and number of lamellae. Model parameters were calibrated on the in-vitro data. Similar to stiffness values reported for other orientations, the outer annulus was found stronger than the inner annulus in the radial direction, with failure at higher stress values. The inner annulus failed more progressively, showing macroscopic failure at a higher strain value. The 1D analytical model of damage showed that lamellar damage is predominant in the failure mechanism of the AF. The analytical model of the connections between lamellae allowed us to represent separately damage processes in the lamellae and the inter-lamellar connections, which cannot be experimentally tested individually.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Author(s). Published by Elsevier Ltd. This article is available under the terms of the Creative Commons Attribution License (CC BY) (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | inter-lamellar behaviour; fibrous tissues; damage; failure; interface |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Funding Information: | Funder Grant number Wellcome Trust 088908/Z/09/Z EU - European Union 306615 EPSRC EP/K020757/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Jul 2016 15:40 |
Last Modified: | 12 Dec 2024 13:54 |
Published Version: | http://dx.doi.org/10.1016/j.jmbbm.2016.06.030 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jmbbm.2016.06.030 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:101801 |