Crackling noise in a discrete element model of single crack propagation

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Crackling noise in a discrete element model of single crack propagation

Gábor Timár, Ferenc Kun

Department of Theoretical Physics, University of Debrecen,P.O. Box 5, H-4010 Debrecen, Hungary.

DOI:

https://doi.org/10.7494/cmms.2011.2.0348

Abstract:

We study the crackling noise emerging during single crack propagation obtained by discrete element modelling (DEM) in a specimen under three-point bending conditions. Analyzing temporal and spatial correlations of local breakings we show that the crack proceeds in bursts, which are characterized by power law distributions of their size and of the waiting times between consecutive events. We obtain a generic scaling form which describes crackling noise in materials with different degrees of heterogeneity. The results are in a good agreement with acoustic emission measurements in three-point bending experiments.

Cite as:

Timár, G., & Kun, F. (2011). Crackling noise in a discrete element model of single crack propagation. Computer Methods in Materials Science, 11(2), 309 – 314. https://doi.org/10.7494/cmms.2011.2.0348

Article (PDF):

Keywords:

Crackling noise, Acoustic emission, Discrete element model, Avalanche, Scaling

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