Journal Article

PreJuSER-19501

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Viscoelastic fracture of biological composites

Bouchbinder, E. ; Brener, E. A.FZJ*

2011
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jmps.2011.08.007

Abstract: Soft constituent materials endow biological composites, such as bone, dentin and nacre, with viscoelastic properties that may play an important role in their remarkable fracture resistance. In this paper we calculate the scaling properties of the quasi-static energy release rate and the viscoelastic contribution to the fracture energy of various biological composites, using both perturbative and non-perturbative approaches. We consider coarse-grained descriptions of three types of anisotropic structures: (i) liquid-crystal-like composites, (ii) stratified composites, (iii) staggered composites, for different crack orientations. In addition, we briefly discuss the implications of anisotropy for fracture criteria. Our analysis highlights the dominant lengthscales and scaling properties of viscoelastic fracture of biological composites. It may be useful for evaluating crack velocity toughening effects and structure-dissipation relations in these materials. (C) 2011 Elsevier Ltd. All rights reserved.

Keyword(s): J ; Biological material (auto) ; Viscoelastic material (auto) ; Fracture toughness (auto) ; Crack mechanics (auto) ; Anisotropic composite material (auto)

Note: EB acknowledges a useful discussion with Peter Fratzl and the support of the Harold Perlman Family Foundation and the Robert Rees Applied Research Fund. EAB acknowledges support of the Erna and Jacob Michael visiting professorship funds at Weizmann Institute of Science.

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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Database coverage:
JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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