Failure mechanism in porous materials under compression: crackling noise in mesoporous SiO2

Salje, Ekhard K. H. and Soto-Parra, Daniel Enrique and Planes, Antoni and Vives, Eduard and Reinecker, Marius and Schranz, Wilfried (2011) Failure mechanism in porous materials under compression: crackling noise in mesoporous SiO2. Philosophical Magazine Letters, 91 (8). pp. 554-560.

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Abstract

The failure mechanism of porous materials under uniaxial stress has been investigated experimentally. Microporous SiO2, Vycor, has been subjected to slowly increasing compressive uniaxial stress with stress rates between 0.2 and 12.2?kPa/s. With increasing stress the strain changes stepwise with acoustic emission correlated with each volume collapse. The acoustic emission followed the characteristics of ?crackling noise? with a power law distribution over an exceptionally large interval of 6 decades at the slowest stress rate. The power law exponent is ?1.39. Possible applications in mining industry and others are discussed. The failure mechanism of porous materials under uniaxial stress has been investigated experimentally. Microporous SiO2, Vycor, has been subjected to slowly increasing compressive uniaxial stress with stress rates between 0.2 and 12.2?kPa/s. With increasing stress the strain changes stepwise with acoustic emission correlated with each volume collapse. The acoustic emission followed the characteristics of ?crackling noise? with a power law distribution over an exceptionally large interval of 6 decades at the slowest stress rate. The power law exponent is ?1.39. Possible applications in mining industry and others are discussed.

Item Type:	Article
Uncontrolled Keywords:	2011AREP; IA63;
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Philosophical Magazine Letters
Volume:	91
Page Range:	pp. 554-560
Depositing User:	Sarah Humbert
Date Deposited:	08 Feb 2012 10:04
Last Modified:	23 Jul 2013 10:03
URI:	http://eprints.esc.cam.ac.uk/id/eprint/2374

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