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Evaluation of a combination of continuum and truss finite elements in a model of passive and active muscle tissue

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  • S. Hedenstierna
  • P. Halldin
  • K. Brolin

Abstract

The numerical method of finite elements (FE) is a powerful tool for analysing stresses and strains in the human body. One area of increasing interest is the skeletal musculature. This study evaluated modelling of skeletal muscle tissue using a combination of passive non-linear, viscoelastic solid elements and active Hill-type truss elements, the super-positioned muscle finite element (SMFE). The performance of the combined materials and elements was evaluated for eccentric motions by simulating a tensile experiment from a published study on a stimulated rabbit muscle including three different strain rates. It was also evaluated for isometric and concentric contractions. The resulting stress–strain curves had the same overall pattern as the experiments, with the main limitation being sensitivity to the active force–length relation. It was concluded that the SMFE could model active and passive muscle tissue at constant rate elongations for strains below failure, as well as isometric and concentric contractions.

Suggested Citation

  • S. Hedenstierna & P. Halldin & K. Brolin, 2008. "Evaluation of a combination of continuum and truss finite elements in a model of passive and active muscle tissue," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 11(6), pages 627-639.
    • Handle: RePEc:taf:gcmbxx:v:11:y:2008:i:6:p:627-639
    DOI: 10.1080/17474230802312516
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