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Localization in Plane Strain Compression of Fluid-Saturated Rock

Makhnenko, Roman Y. / Labuz, Joseph F.

Abstract Localization in terms of a bifurcation from a homogeneous pattern of deformation is predicted to be different if the boundary conditions are drained or undrained. This phenomenon is evaluated in plane strain compression experiments with water-saturated Berea sandstone, where corresponding poroelastic and inelastic properties were measured. Non-uniformity of lateral deformation and clustering of acoustic emission events were used as the experimental evidence of localization, which occurred soon after the peak stress in both drained and undrained cases. These observations are in reasonable agreement with an analysis that predicted negative values of the critical hardening modulus (localization post-peak) for fluid-saturated sandstone under plane strain loading conditions.

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Localization in Plane Strain Compression of Fluid-Saturated Rock

Makhnenko, Roman Y. / Labuz, Joseph F.

Abstract Localization in terms of a bifurcation from a homogeneous pattern of deformation is predicted to be different if the boundary conditions are drained or undrained. This phenomenon is evaluated in plane strain compression experiments with water-saturated Berea sandstone, where corresponding poroelastic and inelastic properties were measured. Non-uniformity of lateral deformation and clustering of acoustic emission events were used as the experimental evidence of localization, which occurred soon after the peak stress in both drained and undrained cases. These observations are in reasonable agreement with an analysis that predicted negative values of the critical hardening modulus (localization post-peak) for fluid-saturated sandstone under plane strain loading conditions.

Localization in Plane Strain Compression of Fluid-Saturated Rock

Makhnenko, Roman Y. / Labuz, Joseph F.

Abstract Localization in terms of a bifurcation from a homogeneous pattern of deformation is predicted to be different if the boundary conditions are drained or undrained. This phenomenon is evaluated in plane strain compression experiments with water-saturated Berea sandstone, where corresponding poroelastic and inelastic properties were measured. Non-uniformity of lateral deformation and clustering of acoustic emission events were used as the experimental evidence of localization, which occurred soon after the peak stress in both drained and undrained cases. These observations are in reasonable agreement with an analysis that predicted negative values of the critical hardening modulus (localization post-peak) for fluid-saturated sandstone under plane strain loading conditions.

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Title:

Localization in Plane Strain Compression of Fluid-Saturated Rock

Contributors:

Makhnenko, Roman Y. (author) / Labuz, Joseph F. (author)

Published in:

Bifurcation and Degradation of Geomaterials with Engineering Applications ; 33-38

Springer Series in Geomechanics and Geoengineering

Publication date:

2017-01-01

Size:

6 pages

ISBN:

978-3-319-56397-8 , 978-3-319-56396-1

ISSN:

1866-8755 , 1866-8763

DOI:

https://doi.org/10.1007/978-3-319-56397-8_5

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Acoustic Emission , Pore Pressure , Direct Shear Test , Acoustic Emission Event , Plane Strain Compression Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences

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