The prediction of stress-relaxation of ligaments and tendons using the quasi-linear viscoelastic model.

Journal Article (Journal Article)

Recent studies have questioned the ability of the quasi-linear viscoelastic (QLV) model to predict stresses and strains in response to loading conditions other than those used to fit the model. The objective of this study was to evaluate the ability of several models in the literature to predict the elastic stress response of ligament and tendon at strain levels higher than the levels used to fit the model. The constitutive models were then used to evaluate the ability of the QLV model to predict the overall stress response during stress relaxation. The models expressing stress as an exponential function of strain significantly overestimated stress when used at higher strain levels. The polynomial formulation of the Mooney-Rivlin model more accurately predicted the stress-strain behavior of ligament and tendon. The results demonstrate that the ability of the QLV model to accurately predict the stress-relaxation response is dependent in part on the accuracy of the function used to model the elastic response of the soft tissue.

Full Text

Duke Authors

Cited Authors

  • Defrate, LE; Li, G

Published Date

  • July 2007

Published In

Volume / Issue

  • 6 / 4

Start / End Page

  • 245 - 251

PubMed ID

  • 16941137

International Standard Serial Number (ISSN)

  • 1617-7959

Digital Object Identifier (DOI)

  • 10.1007/s10237-006-0056-8


  • eng

Conference Location

  • Germany