Continuum description of the Poisson's ratio of ligament and tendon under finite deformation.

ABSTRACT: Ligaments and tendons undergo volume loss when stretched along the primary fiber axis, which is evident by the large, strain-dependent Poisson's ratios measured during quasi-static tensile tests. Continuum constitutive models that have been used to describe ligament material behavior generally assume incompressibility, which does not reflect the volumetric material behavior seen experimentally. We developed a strain energy equation that describes large, strain dependent Poisson's ratios and nonlinear, transversely isotropic behavior using a novel method to numerically enforce the desired volumetric behavior. The Cauchy stress and spatial elasticity tensors for this strain energy equation were derived and implemented in the FEBio finite element software (www.febio.org). As part of this obje

SUBMITTER: Swedberg AM 

PROVIDER: S-EPMC4179457 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature