Anisotropy in hypoelastic soft-tissue mechanics, II: Simple extensional experiments
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Isochoric, hypoelastic, material models are employed to describe the passive response of isotropic and anisotropic soft tissues, using experimental data that have been taken from the literature. The isotropic tissues modeled are elastin and fat, and the anisotropic tissue modeled is tendon. A graphical technique is provided for estimating the material parameters of the anisotropic model, whose values are contrasted with maximum likelihood estimates. All numerical integrations were made with a new 4(3) Runge-Kutta integrator whose quadratures and weights are motivated by finite-element theory.
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