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An anisotropic viscoelastic soft tissue model at large strains
Author(s) -
Görke UweJens,
Günther Hubert,
Bucher Anke,
Kreißig Reiner
Publication year - 2006
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200610045
Subject(s) - viscoelasticity , anisotropy , isotropy , transverse isotropy , context (archaeology) , materials science , phenomenological model , soft tissue , biological materials , biological tissue , matrix (chemical analysis) , phase (matter) , mechanics , composite material , chemistry , physics , biomedical engineering , condensed matter physics , engineering , geology , optics , medicine , paleontology , pathology , organic chemistry
Abstract Soft biological tissues represent complex inhomogeneous, and as a rule multiphase materials subjected to large strains under in vivo mechanical conditions. Apart from a number of other structural‐related features they are characterized by a ratedependent material behavior which is attributed to fluid‐solid interactions as well as intrinsic viscoelastic properties of the solid matrix. The authors propose to model rate‐dependent phenomena of the solid phase of soft biological tissues within the context of a thermodynamically consistent phenomenological material approach resulting from an overstress concept. Due to the presence of directed fibrous constituents soft tissues should be considered as anisotropic materials. Therefore, the viscous overstress model has been completed by a transversely isotropic approach. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)