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A constitutive law for the failure behavior of medial collateral ligaments

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Abstract

A constitutive model is proposed for the description of the tensile properties of medial collateral ligaments (MCLs). The model can reproduce the three regions – the toe region, the linear region, and the failure region – of the stress–stretch curve of ligamentous tissues. The collagen fibers are assumed to be the only load-bearing component of the tissues. They are all oriented along the physiological loading direction of the ligament. They are crimped in the slack configuration and are unable to sustain load. After becoming taut and before failing, each collagen fiber exhibits a linear elastic behavior. The fiber straightening and failure processes are defined stochastically by means of Weibull distributions. Published experimental data for the MCLs are employed to validate the constitutive relationship. Finally, the constitutive model is generalized in order to describe the three-dimensional mechanical behavior of the ligaments by following he structural approach.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, 305 Durham Hall, Blacksburg, VA, 24061, USA

    Raffaella De Vita

  2. Department of Mechanical Engineering, University of Pittsburgh, 665 Benedum Hall, 3700 O’Hara Street, Pittsburgh, PA, 15261, USA

    William S. Slaughter

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  1. Raffaella De Vita
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  2. William S. Slaughter
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Correspondence to Raffaella De Vita.

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De Vita, R., Slaughter, W.S. A constitutive law for the failure behavior of medial collateral ligaments. Biomech Model Mechanobiol 6, 189–197 (2007). https://doi.org/10.1007/s10237-006-0054-x

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  • DOI: https://doi.org/10.1007/s10237-006-0054-x

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