A Constitutive Equation for the Canine Anterior Cruciate Ligament

[+] Author and Article Information
D. N. Bingham

Division of Interdisciplinary Studies, Clemson University, Clemson, S.C. 29631; Mechanical Engineering Department, Union College, Schenectady, N.Y. 12308

P. H. DeHoff

Mechanical Engineering Department, Bucknell University, Lewisburg, Pa. 17837; ESM Department, University of North Carolina at Charlotte, UNCC Station, Charlotte, N.C. 28228

J Biomech Eng 101(1), 15-22 (Feb 01, 1979) (8 pages) doi:10.1115/1.3426217 History: Received July 25, 1978; Online October 21, 2010


A simplified constitutive equation is proposed to characterize the nonlinear viscoelastic behavior of the canine anterior cruciate ligament. The theory contains a single relaxation function which was measured experimentally by a series of uniaxial relaxation tests. To test the applicability of the theory, the experimentally determined function was used to attempt to predict the results of a special log-ramp test, as well as a constant strain-rate test. It was found that the simplified equation predicted stress results which were somewhat higher than experiment throughout much of the strain range tested.

Copyright © 1979 by ASME
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