A procedure for a two-level modeling of deformation of skeletal muscles is offered. Based on a phenomenological model of an individual muscle fiber, consisting of a viscous, a contractive, and two nonlinearly elastic elements (the first level), various means for describing a skeletal muscle as a whole (the second, macroscopic level) are considered. A method for identification of a muscle model by utilizing experimental elongation diagrams in a passive state and in isotonic contraction is put forward. The results of a biomechanical analysis are compared with known experimental data for the isotonic and isometric activation regimes of tailor’s muscle of a frog. It is established that preferable is the description of a muscle that takes into account the different lengths of muscle fibers and their twist.
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This investigation was performed within the framework of project 5.30.01 of the State Program of Scientific Research of Belarus Republic “Convergence” (“Interdisciplinary Scientific Research and New Emerging Technologies as a Basis for a Stable Innovative Development”).
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 48, No. 3, pp. 485-502, May-June, 2012.
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Shil’ko, S.V., Chernous, D.A. & Pleskachevskii, Y.M. Nonlinear deformation of skeletal muscles in a passive state and in isotonic contraction. Mech Compos Mater 48, 331–342 (2012). https://doi.org/10.1007/s11029-012-9280-8
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DOI: https://doi.org/10.1007/s11029-012-9280-8