The effect of disorder on crackling noise in fracture phenomena

Zoltán Halász, Gábor Timár, F. Kun

Research output: Contribution to journalArticle

Abstract

We study the effect of disorder on crackling noise accompanying the fracture of heterogeneous materials. Two different types of system are considered: we analyze the three-point bending of a bar shaped specimen where the boundary and loading conditions ensure that crackling occurs during the propagation of a single crack; then we study a bundle of fibers where noise emerges as a consequence of spatially uncorrelated stick-slip rearrangements. We show that bursts characterizing the jerky propagation of a crack have a power law size distribution with an exponent which does not depend on the amount of disorder. Our calculations revealed that varying the amount of disorder in a stick-slip system, a phase-transition occurs: at high disorder stick-slip rearrangements occur in small bursts, while at low disorder macroscopic avalanches snap the system. Our investigations demonstrate that the relevance of disorder on crackling noise is strongly influenced by the presence or absence of stress concentrations in the system.

Original languageEnglish
Pages (from-to)385-399
Number of pages15
JournalProgress of Theoretical Physics Supplement
Issue number184
Publication statusPublished - 2010

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disorders
slip
bursts
cracks
propagation
stress concentration
avalanches
bundles
exponents
boundary conditions
fibers

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

The effect of disorder on crackling noise in fracture phenomena. / Halász, Zoltán; Timár, Gábor; Kun, F.

In: Progress of Theoretical Physics Supplement, No. 184, 2010, p. 385-399.

Research output: Contribution to journalArticle

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