Surface Strain Variation in Human Patellar Tendon and Knee Cruciate Ligaments

[+] Author and Article Information
D. L. Butler, D. C. Stouffer

Noyes-Giannestras Biomechanics Laboratory, Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, Cincinnati, OH 45221-0048

M. Y. Sheh

Current Product Engineering, General Motors Technical Center, Warren, MI 48090–91010

V. A. Samaranayake

Department of Mathematics and Statistics, University of Missouri-Rolla, Rolla, MO 65401

M. S. Levy

Department of Quantitative Analysis and Information Systems, University of Cincinnati, Cincinnati, OH 45221-0130

J Biomech Eng 112(1), 38-45 (Feb 01, 1990) (8 pages) doi:10.1115/1.2891124 History: Received March 16, 1987; Revised September 03, 1989; Online March 17, 2008


Local surface strains in bone-fascicle-bone subunits from human patellar tendon and anterior and posterior cruciate ligaments were measured between markers using low-speed photography during low rate subfailure testing. A simple stress-strain relationship of the power form was found to describe the bone-to-bone responses up to four percent strain for all three tissue types examined. The regional material behavior were best fit using an inverted strain-stress relationship, however. The power model, fitted to the experimental data, conformed to the expected stress-strain relationship better than either the quadratic or cubic models. With few exceptions, for a given stress, the strains near the proximal and distal bone ends were not significantly different from each other, but were significantly higher than the strains in the tissue midregions. Local strain patterns generally varied among subunits from the same tissue.

Copyright © 1990 by The American Society of Mechanical Engineers
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