A three-dimensional constitutive model for muscle and tendon tissues is developed. Muscle and tendon are considered as composite materials that consist of fibers and the connective tissues and biofluids surrounding the fibers. The model is nonlinear, rate dependent, and anisotropic due to the presence of the fibers. Both the active and passive behaviors of the muscle are considered. The muscle fiber stress depends on the strain (length), strain-rate (velocity), and the activation level of the muscle, whereas the tendon fiber exhibits only passive behavior and the stress depends only on the strain. Multiple fiber directions are modeled via superposition. A methodology for the numerical implementation of the constitutive model in a general-purpose finite element program is developed. The current scheme is used for either static or dynamic analyses. The model is validated by studying the extension of a squid tentacle during a strike to catch prey. The behavior of parallel-fibered and pennate muscles, as well as the human semitendinosus muscle, is studied.
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July 2011
Research Papers
Muscle and Tendon Tissues: Constitutive Modeling and Computational Issues
N. Aravas
N. Aravas
Department of Mechanical Engineering,
e-mail: aravas@mie.uth.gr
University of Thessaly
, 38334 Volos, Greece; The Mechatronics Institute, Center for Research and Technology-Thessaly (CE.RE.TE.TH.)
, 38500 Volos, Greece
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N. Aravas
Department of Mechanical Engineering,
University of Thessaly
, 38334 Volos, Greece; The Mechatronics Institute, Center for Research and Technology-Thessaly (CE.RE.TE.TH.)
, 38500 Volos, Greecee-mail: aravas@mie.uth.gr
J. Appl. Mech. Jul 2011, 78(4): 041015 (10 pages)
Published Online: April 14, 2011
Article history
Received:
October 28, 2010
Revised:
February 28, 2011
Posted:
March 2, 2011
Published:
April 14, 2011
Online:
April 14, 2011
Citation
Spyrou, L. A., and Aravas, N. (April 14, 2011). "Muscle and Tendon Tissues: Constitutive Modeling and Computational Issues." ASME. J. Appl. Mech. July 2011; 78(4): 041015. https://doi.org/10.1115/1.4003741
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