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Modeling of damage in soft biological tissues and application to arterial walls
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Biomechanics. Graz University of Technology, Institute of Biomechanics, Center of Biomedical Engineering.
2011 (English)In: Computational Plasticity XI - Fundamentals and Applications, 2011, 764-775 p.Conference paper (Refereed)
Abstract [en]

A new material model is proposed for the description of stress-softening observed in cyclic tension tests performed on soft biological tissues. The modeling framework is based on the concept of internal variables introducing a scalar-valued variable for the representation of fiber damage. Remanent strains in fiber direction can be represented as a result of microscopic damage of the fiber crosslinks. Particular internal variables are defined able to capture the nature of soft biological tissues that no damage occurs in the physiological loading domain. A specific model is adjusted to experimental data taking into account the supra-physiological loading regime. For the description of the physiological domain polyconvex functions are used which also take into account fiber dispersion in a phenomenological approach. The applicability of the model in numerical simulations is shown by a representative example where the damage distribution in an arterial cross-section is analyzed.

Place, publisher, year, edition, pages
2011. 764-775 p.
Keyword [en]
Arterial walls, Computational biomechanics, Damage mechanics, Soft biological tissues, Softening behavior, Arterial wall, Soft biological tissue, Biomechanics, Fibers, Loading, Physiology, Stresses, Tensile testing, Physiological models
National Category
Other Industrial Biotechnology
URN: urn:nbn:se:kth:diva-149922ISI: 000313557900068ScopusID: 2-s2.0-84858990505ISBN: 9788489925731OAI: diva2:742204
11th International Conference on Computational Plasticity, COMPLAS XI, 7 September 2011 through 9 September 2011, Barcelona

QC 20140901

Available from: 2014-09-01 Created: 2014-08-28 Last updated: 2014-09-01Bibliographically approved

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