Viscoelastic constitutive law in large deformations: application to human knee ligaments and tendons

Details

Serval ID
serval:BIB_ACB6E1C4D6A3
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Viscoelastic constitutive law in large deformations: application to human knee ligaments and tendons
Journal
Journal of Biomechanics
Author(s)
Pioletti  D. P., Rakotomanana  L. R., Benvenuti  J. F., Leyvraz  P. F.
ISSN
0021-9290 (Print)
Publication state
Published
Issued date
08/1998
Volume
31
Number
8
Pages
753-7
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Aug
Abstract
Traction tests on soft tissues show that the shape of the stress strain curves depends on the strain rate at which the tests are performed. Many of the constitutive models that have been proposed fail to properly consider the effect of the strain rate when large deformations are encountered. In the present study, a framework based on elastic and viscous potentials is developed. The resulting constitutive law is valid for large deformations and satisfies the principles of thermodynamics. Three parameters -- two for the elasticity and one for the viscosity -- were enough to precisely fit the non-linear stress strain curves obtained at different strain rates with human cruciate ligaments and patellar tendons. The identification results then in a realistic, three-dimensional viscoelastic constitutive law. The developed constitutive law can be used regardless of the strain or rotation values. It can be incorporated into a finite element program to model the viscoelastic behavior of ligaments and tendons under dynamic situations.
Keywords
Algorithms Anterior Cruciate Ligament/anatomy & histology/*physiology Elasticity Finite Element Analysis Humans Knee Joint Models, Biological Nonlinear Dynamics Patellar Ligament/anatomy & histology/*physiology Posterior Cruciate Ligament/anatomy & histology/*physiology Reproducibility of Results Rotation Stress, Mechanical Thermodynamics Viscosity
Pubmed
Web of science
Create date
28/01/2008 13:22
Last modification date
20/08/2019 16:16
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