Failure mechanism in porous materials under compression: crackling noise in mesoporous SiO(2)

Autor(en)

Ekhard K H Salje, Daniel Enrique Soto-Parra, Antoni Planes, Eduard Vives, Marius Reinecker, Wilfried Schranz

Abstrakt

The failure mechanism of porous materials under uniaxial stress has been investigated experimentally. Microporous SiO(2), 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.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

University of Cambridge, Universitat Autònoma de Barcelona , Universitat de Barcelona

Journal

Philosophical Magazine Letters

Band

91

Seiten

554-560

Anzahl der Seiten

7

ISSN

0950-0839

DOI

https://doi.org/10.1080/09500839.2011.596491

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/57eba27d-b838-4ad9-9fd0-5a8e8eb38d68