Viscoelastic properties of the cervical spinal ligaments under fast strain-rate deformations.

Published

Journal Article

The mechanical response of ligaments under fast strain-rate deformations is a necessary input into computational models that are used for injury assessment. However, this information frequently is not available for the ligaments that are routinely injured in fast-rate loading scenarios. In the current study, experiments were conducted at fast strain rates for the cervical spinal ligaments: the anterior longitudinal ligament, the posterior longitudinal ligament and the ligamentum flavum. Bone-ligament-bone complexes at three spine levels were harvested for mechanical testing. Displacement-controlled sub-failure uniaxial tensile tests were performed in both load-relaxation and sinusoidal conditions. A nonlinear (separable) viscoelastic model was used to examine the experimental data. An unexpected result of the modeling was that the instantaneous elastic functions could be approximated as linear for these strain rates. A five-parameter model was sufficient to characterize the ligament viscoelastic responses and had good predictive capacity under different applied loading conditions.

Full Text

Cited Authors

  • Lucas, SR; Bass, CR; Salzar, RS; Oyen, ML; Planchak, C; Ziemba, A; Shender, BS; Paskoff, G

Published Date

  • January 2008

Published In

Volume / Issue

  • 4 / 1

Start / End Page

  • 117 - 125

PubMed ID

  • 17923449

Pubmed Central ID

  • 17923449

Electronic International Standard Serial Number (EISSN)

  • 1878-7568

International Standard Serial Number (ISSN)

  • 1742-7061

Digital Object Identifier (DOI)

  • 10.1016/j.actbio.2007.08.003

Language

  • eng