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Modeling and experimental investigations of the stress-softening behavior of soft collagenous tissues
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.). Graz University of Technology, Austria.
2013 (English)In: Computational Plasticity XII: Fundamentals and Applications - Proceedings of the 12th International Conference on Computational Plasticity - Fundamentals and Applications, COMPLAS 2013, Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 2013, 133-144 p.Conference paper (Refereed)
Abstract [en]

This paper deals with the formulation of a micro-mechanically based damage model for soft collagenous tissues. The model is motivated by (i) a sliding filament model proposed in the literature [1] and (ii) by experimental observations from electron microscopy (EM) images of human abdominal aorta specimens, see [2]. Specifically, we derive a continuum damage model that takes into account statistically distributed proteoglycan (PG) bridges. The damage model is embedded into the constitutive framework proposed by Balzani et al. [3] and adjusted to cyclic uniaxial tension tests of a human carotid artery. Furthermore, the resulting damage distribution of the model after a circumferential overstretch of a simplified arterial section is analyzed in a finite element calculation.

Place, publisher, year, edition, pages
Barcelona: International Center for Numerical Methods in Engineering (CIMNE), 2013. 133-144 p.
Keyword [en]
Artery, Biomechanics, Collagen, Constitutive modeling, Microstructure
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-140978ISI: 000345240600012ScopusID: 2-s2.0-84891276254ISBN: 978-849415315-0OAI: diva2:695763
12th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS 2013; Barcelona; Spain; 3 September 2013 through 5 September 2013

QC 20140205

Available from: 2014-02-12 Created: 2014-02-05 Last updated: 2015-12-03Bibliographically approved

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Holzapfel, Gerhard A.
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