UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Imaging compaction band propagation in Diemelstadt sandstone using acoustic emission locations

Townend, E; Thompson, BD; Benson, PM; Meredith, PG; Baud, P; Young, RP; (2008) Imaging compaction band propagation in Diemelstadt sandstone using acoustic emission locations. Geophysical Research Letters , 35 (15) , Article L15301. 10.1029/2008GL034723. Green open access

[img]
Preview
PDF
2008GL034723.pdf
Available under License : See the attached licence file.

Download (278kB)

Abstract

We report results from a conventional triaxial test performed on a specimen of Diemelstadt sandstone under an effective confining pressure of 110 MPa; a value sufficient to induce compaction bands. The maximum principal stress was applied normal to the visible bedding so that compaction bands propagated parallel to bedding. The spatio-temporal distribution of acoustic emission events greater than 40 dB in amplitude, and associated with the propagation of the first compaction band, were located in 3D, to within +/- 2 mm, using a Hyperion Giga-RAM recorder. Event magnitudes were used to calculate the seismic b- value at intervals during band growth. Results show that compaction bands nucleate at the specimen edge and propagate across the sample at approximately 0.08 mm s(-1). The seismic b-value does not vary significantly during deformation, suggesting that compaction band growth is characterized by small scale cracking that does not change significantly in scale.

Type: Article
Title: Imaging compaction band propagation in Diemelstadt sandstone using acoustic emission locations
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2008GL034723
Publisher version: http://dx.doi.org/10.1029/2008GL034723
Language: English
Additional information: Copyright 2008 by the American Geophysical Union
Keywords: Porous rock, Shear fracture, Localization, Deformation, Transition, Evolution, Granite, Failure, Cracks, Damage
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/93548
Downloads since deposit
121Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item