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The Brittle-Ductile Transition in Porous Limestone Imaged by X-Ray Computed Tomography and Digital Image Correlation

Baud, Patrick ; Hall, Stephen LU ; Ji, Yuntao ; Wong, Teng-fong and Heap, Michael J. (2017) 6th Biot Conference on Poromechanics, Poromechanics 2017 p.1782-1788
Abstract

We studied the brittle-ductile transition in three porous carbonates, Indiana, USA, Majella, Italy, and Leitha, Austria, with porosity ranging between 16 and 31%. A series of triaxial experiments were performed at room temperature, constant strain rate, and at effective pressures ranging from 5 to 150 MPa. Several sets of X-ray Tomography images were acquired before and after deformation. 3D digital image correlation (DIC) was performed on the images of the intact and deformed samples. The use of 3D-volumetric DIC allowed us to map out the subtle development of strain localization associated with the transition from brittle faulting to cataclastic flow in the three limestones. Our observations showed that strain localization may develop... (More)

We studied the brittle-ductile transition in three porous carbonates, Indiana, USA, Majella, Italy, and Leitha, Austria, with porosity ranging between 16 and 31%. A series of triaxial experiments were performed at room temperature, constant strain rate, and at effective pressures ranging from 5 to 150 MPa. Several sets of X-ray Tomography images were acquired before and after deformation. 3D digital image correlation (DIC) was performed on the images of the intact and deformed samples. The use of 3D-volumetric DIC allowed us to map out the subtle development of strain localization associated with the transition from brittle faulting to cataclastic flow in the three limestones. Our observations showed that strain localization may develop at relatively small axial strains of ~1%, in both the brittle faulting and transitional regimes. In Majella limestone (porosity = 31%), the localized deformation involved both shear and compaction. Compaction bands were only observed in less cemented samples of Leitha limestone.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics
editor
Vandamme, Matthieu ; Dangla, Patrick ; Pereira, Jean-Michel and Ghabezloo, Siavash
pages
7 pages
publisher
American Society of Civil Engineers (ASCE)
conference name
6th Biot Conference on Poromechanics, Poromechanics 2017
conference location
Paris, France
conference dates
2017-07-09 - 2017-07-13
external identifiers
  • scopus:85026290777
ISBN
9780784480779
DOI
10.1061/9780784480779.220
language
English
LU publication?
yes
id
8502881b-2fc4-4d60-92a2-4074fb9d0422
date added to LUP
2017-09-01 15:17:07
date last changed
2022-04-25 02:21:29
@inproceedings{8502881b-2fc4-4d60-92a2-4074fb9d0422,
  abstract     = {{<p>We studied the brittle-ductile transition in three porous carbonates, Indiana, USA, Majella, Italy, and Leitha, Austria, with porosity ranging between 16 and 31%. A series of triaxial experiments were performed at room temperature, constant strain rate, and at effective pressures ranging from 5 to 150 MPa. Several sets of X-ray Tomography images were acquired before and after deformation. 3D digital image correlation (DIC) was performed on the images of the intact and deformed samples. The use of 3D-volumetric DIC allowed us to map out the subtle development of strain localization associated with the transition from brittle faulting to cataclastic flow in the three limestones. Our observations showed that strain localization may develop at relatively small axial strains of ~1%, in both the brittle faulting and transitional regimes. In Majella limestone (porosity = 31%), the localized deformation involved both shear and compaction. Compaction bands were only observed in less cemented samples of Leitha limestone.</p>}},
  author       = {{Baud, Patrick and Hall, Stephen and Ji, Yuntao and Wong, Teng-fong and Heap, Michael J.}},
  booktitle    = {{Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics}},
  editor       = {{Vandamme, Matthieu and Dangla, Patrick and Pereira, Jean-Michel and Ghabezloo, Siavash}},
  isbn         = {{9780784480779}},
  language     = {{eng}},
  pages        = {{1782--1788}},
  publisher    = {{American Society of Civil Engineers (ASCE)}},
  title        = {{The Brittle-Ductile Transition in Porous Limestone Imaged by X-Ray Computed Tomography and Digital Image Correlation}},
  url          = {{http://dx.doi.org/10.1061/9780784480779.220}},
  doi          = {{10.1061/9780784480779.220}},
  year         = {{2017}},
}