Premium
Micro‐mechanical modeling of anisotropic inelastic response of soft tissues under supra‐physiological loading
Author(s) -
Linka Kevin,
Khiêm Vu Ngoc,
Itskov Mikhail
Publication year - 2014
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201410036
Subject(s) - softening , anisotropy , soft tissue , materials science , deformation (meteorology) , hysteresis , composite material , stress (linguistics) , viscoelasticity , work (physics) , structural engineering , physics , engineering , thermodynamics , optics , condensed matter physics , medicine , linguistics , philosophy , pathology
Under supra‐physiological loading, soft tissues exhibit many inelastic phenomena, such as stress softening, hysteresis and permanent set [1]. Knowledge of the mechanical response of soft tissues under such a large range of deformation is vital for optimizations of vascular medical devices or improvement of injury prevention techniques. In this work, a micro‐mechanical model is proposed for soft collagenous tissues. Besides the anisotropy the model can also describe the aforementioned inelastic effects under extremal loadings. To this end, the dispersion of collagen fibers in the soft tissues is captured by a probability distribution of fiber orientations around preferred directions. The deformation induced damage inside the tissue is assumed to take place between collagen fibrils and is included within a statistical mechanical framework. Finally, the accuracy of the model is assessed by comparison with experimental data available in the literature. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)