Surface Strain Variation in Human Patellar Tendon and Knee Cruciate Ligaments
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.
D. L. Butler et al., "Surface Strain Variation in Human Patellar Tendon and Knee Cruciate Ligaments," Journal of Biomechanical Engineering, American Society of Mechanical Engineers (ASME), Jan 1990.
The definitive version is available at http://dx.doi.org/10.1115/1.2891124
Mathematics and Statistics
Keywords and Phrases
tendons; knee; bone; biological tissues; stress; stress-strain relations; testing
Article - Journal
© 1990 American Society of Mechanical Engineers (ASME), All rights reserved.