A comparison of hyperelastic constitutive models applicable to brain and fat tissues.

ABSTRACT: In some soft biological structures such as brain and fat tissues, strong experimental evidence suggests that the shear modulus increases significantly under increasing compressive strain, but not under tensile strain, whereas the apparent Young's elastic modulus increases or remains almost constant when compressive strain increases. These tissues also exhibit a predominantly isotropic, incompressible behaviour. Our aim is to capture these seemingly contradictory mechanical behaviours, both qualitatively and quantitatively, within the framework of finite elasticity, by modelling a soft tissue as a homogeneous, isotropic, incompressible, hyperelastic material and comparing our results with available experimental data. Our analysis reveals that the Fung and Gent models, which are typically us

SUBMITTER: Mihai LA 

PROVIDER: S-EPMC4614457 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature