Vol. 3, No. 5, 2008

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Anisotropy in hypoelastic soft-tissue mechanics, I: Theory

Alan David Freed

Vol. 3 (2008), No. 5, 911–928

A hypoelastic constitutive theory is derived with an eye towards modeling the passive response of soft anisotropic biological tissues. Anisotropy is handled through a material tensor whose construction is independent of the constitutive formulation. Anisotropy tensors are provided for tissues that have a single dominant fiber family with an elliptic fiber projection onto the transverse plane, and their limiting cases. The tissue is comprised of two constituents: a matrix phase and a fiber phase. The theory is derived in the polar configuration, for ease of handling the derivatives, and then mapped into the commonly used Eulerian configuration. Kirchhoff stress and its conjugate strain-rate are the state variables.

anisotropy, finite deformations, hypoelasticity, polar configuration, polar rates, polar strain, polar stress, soft tissue, spin, swirl, vorticity
Received: 9 January 2008
Revised: 21 March 2008
Accepted: 5 April 2008
Published: 1 July 2008
Alan David Freed
202 Pioneer Hall
Saginaw Valley State University
University Center, MI 48710
United States