Strain-rate sensitivity of the lateral collateral ligament of the knee
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The material properties of ligaments are not well characterized at rates of deformation that occur during high-speed injuries. The aim of this study was to measure the material properties of lateral collateral ligament of the porcine stifle joint in a uniaxial tension model through strain rates in the range from 0.01 to 100/s. Failure strain, tensile modulus and failure stress were calculated. Across the range of strain rates, tensile modulus increased from 288 to 905 MPa and failure stress increased from 39.9 to 77.3 MPa. The strain-rate sensitivity of the material properties decreased as deformation rates increased, and reached a limit at approximately 1/s, beyond which there was no further significant change. In addition, time resolved microfocus small angle X-ray scattering was used to measure the effective fibril modulus (stress/fibril strain) and fibril to tissue strain ratio. The nanoscale data suggest that the contribution of the collagen fibrils towards the observed tissue-level deformation of ligaments diminishes as the loading rate increases. These findings help to predict the patterns of limb injuries that occur at different speeds and improve computational models used to assess and develop mitigation technology.
Date Issued
2015-01-01
Date Acceptance
2014-07-01
Citation
Journal of The Mechanical Behavior of Biomedical Materials, 2015, 41 (1), pp.261-270
ISSN
1751-6161
Publisher
Elsevier
Start Page
261
End Page
270
Journal / Book Title
Journal of The Mechanical Behavior of Biomedical Materials
Volume
41
Issue
1
Copyright Statement
Copyright © 2015 Elsevier Ltd. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in Journal of the Mechanical Behavior of Biomedical Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the Mechanical Behavior of Biomedical Materials, vol 41, 2015. DOI:10.1016/j.jmbbm.2014.07.004
Sponsor
The Royal British Legion
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000346217400025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
Centre for Blast Injury Studie
Subjects
Science & Technology
Technology
Engineering, Biomedical
Materials Science, Biomaterials
Engineering
Materials Science
Ligament
Stress
Modulus
Strain rate
Injury
ANTERIOR CRUCIATE LIGAMENT
X-RAY-SCATTERING
MECHANICAL-PROPERTIES
PATELLAR TENDON
CONNECTIVE TISSUES
COLLAGEN
FAILURE
MODEL
INJURY
STRENGTH
Publication Status
Published
Date Publish Online
2014-07-09