Scaling in temporal occurrence of quasi-rigid-body vibration pulses due to macrofractures

Abstract

We subjected the time series of quasi-rigid-body vibration pulses (elastic emissions) from laboratory fracture carried out by a piezoelectric accelerometer on concrete and rock specimens under uniaxial compression to statistical analysis. In both cases, we find that the waiting-time distribution can be described by a scaling law extending over several orders of magnitude. This law is indistinguishable from a universal scaling law recently proposed for the waiting-time distributions of acoustic emissions in heterogeneous materials and earthquakes, suggesting its general validity for fracture processes independent of modes and magnitude scales.

Collapsing minerals: Crackling noise of sandstone and coal, and the predictability of mining accidents

“…Earthquakes and the collapse of porous materials are related phenomena deeply connected by the emission of crackling noise Salje and Dahmen 2014;Sethna et al 2001) where systems under slow perturbation respond through discrete events, so-called "jerks," with a huge variety of sizes and energies. The signatures of seismic events in geophysics coincide with laboratory-scale experiments ("labquakes") of compressed porous and fractured materials (Davidsen et al 2007;Diodati et al 1991;Hirata 1987;Kun et al 2007Kun et al , 2009Lebyodkin et al 2013;Nataf et al 2014a;Niccolini et al 2009Niccolini et al , 2010Niccolini et al , 2011Petri et al 1994;Salje et al 2013;Weiss and Miguel 2004) and have been simulated by numerical discrete element calculations of porous materials (Kun et al 2013(Kun et al , 2014. In laboratory experiments, external loading is applied to the samples and the system's response is obtained by recording acoustic emission (AE).…”

RETRACTED ARTICLE: Correlation between acoustic and other forms of energy emissions from fracture phenomena

“…The tests were carried out at the Laboratory of Fracture Mechanics of the Politecnico di Torino, Italy. By subjecting quasi-brittle materials such as granitic rocks to compression tests, for the first time, bursts of neutron emission (NE) during the failure process were observed [1][2][3][4][5], necessarily involving nuclear reactions, besides the well-known acoustic emission (AE) [6][7][8][9][10][11][12][13], and the phenomenon of electromagnetic radiation (EM) [14][15][16][17][18][19], which is highly suggestive of charge redistribution during material failure and at present under investigation.…”

“…While the mechanism of AE is fully understood, being provided by transient elastic waves due to stress redistribution following fracture propagation [6][7][8][9][10][11][12][13], the origin of EME from fracture is not completely clear and different attempts have been made to explain it.…”

Analogies Between the Cracking Noise of Ethanol-Dampened Charcoal and Earthquakes

“…89.75.Da, 62.20.mt, Earthquakes and fractures of materials are phenomena deeply connected under the crackling noise idea [1,2], in which systems under slow perturbation respond through discrete events with a huge variety of sizes. The most fundamental seismic laws also emerge in laboratory-scale experiments related to the fracture of materials [3][4][5][6][7][8][9][10][11][12][13][14][15][16] and have been recently reproduced by numerical discrete element simulations of porous materials [17,18]. In these experiments, an external and constant loading is applied to the material and the system' response is usually obtained by recording acoustic emissions.…”