Grain-based characterisation and acoustic wave propagation in a sand packing subject to triaxial compression

Saadatfar, M.; Francois, N.; Arad, A.; Madadi, Mahyar; Sheppard, A.; Senden, T.; Knackstedt, M.

doi:10.1063/1.4811995

Access Status

Open access via publisher

Authors

Saadatfar, M.

Francois, N.

Arad, A.

Madadi, Mahyar

Sheppard, A.

Senden, T.

Knackstedt, M.

Date

2013

Type

Conference Paper

Metadata

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Citation

Saadatfar, M. and Francois, N. and Arad, A. and Madadi, M. and Sheppard, A. and Senden, T. and Knackstedt, M. 2013. Grain-based characterisation and acoustic wave propagation in a sand packing subject to triaxial compression, pp. 571-574.

Source Title

AIP Conference Proceedings

DOI

10.1063/1.4811995

ISBN

9780735411661

School

Department of Exploration Geophysics

URI

http://hdl.handle.net/20.500.11937/29452

Collection

Curtin Research Publications

Abstract

This paper presents a study of 3D deformation process in a dry packing of Ottawa sand. X-ray microtomography is used to acquire scans of a triaxial test of the sample at five axial stress levels. Using 3D image analysis we are able to resolve particle scale features. Particle tracking combined with finite element simulations reveal that the rotational transformation of particles is one of the primary mechanisms of elastic energy dissipation at the grain scale. By analysing grain contact orientation, we show that stress induced anisotropy is spatially correlated to the compressional elastic wave. © 2013 AIP Publishing LLC.