Universität zu Köln

Zaiser, M., Lennartz-Sassinek, S. and Moretti, P. (2015). Crack phantoms: localized damage correlations and failure in network models of disordered materials. J. Stat. Mech.-Theory Exp.. BRISTOL: IOP PUBLISHING LTD. ISSN 1742-5468

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Abstract

We study the initiation of failure in network models of disordered materials such as random fuse and spring models, which serve as idealized representations of fracture processes in quasi-two-dimensional, disordered material systems. We consider two different geometries, namely rupture of thin sheets and delamination of thin films, and demonstrate that irrespective of geometry and implementation of the disorder (random failure thresholds versus dilution disorder) failure initiation is associated with the emergence of typical localized correlation structures in the damage patterns. These structures ('crack phantoms') exhibit well-defined characteristic lengths, which relate to the failure stress by scaling relations that are typical for critical crack nuclei in disorder-free materials. We discuss our findings in view of the fundamental nature of failure processes in materials with random microstructural heterogeneity.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zaiser, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lennartz-Sassinek, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moretti, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-396787
DOI:	10.1088/1742-5468/2015/08/P08029
Journal or Publication Title:	J. Stat. Mech.-Theory Exp.
Date:	2015
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1742-5468
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BREAKDOWN; FRACTURE Multiple languages Mechanics; Physics, Mathematical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39678