The Brittle-Ductile Transition in Porous Limestone Imaged by X-Ray Computed Tomography and Digital Image Correlation
(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
- Baud, Patrick ; Hall, Stephen LU ; Ji, Yuntao ; Wong, Teng-fong and Heap, Michael J.
- organization
- publishing date
- 2017
- 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}}, }