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The Brittle-Ductile...
The Brittle-Ductile Transition in Porous Limestone Imaged by X-Ray Computed Tomography and Digital Image Correlation
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- Baud, Patrick (författare)
- University of Strasbourg
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- Hall, Stephen (författare)
- Lund University,Lunds universitet,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH,Other Institutions and Utilities
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- Ji, Yuntao (författare)
- Institute of Geology and Geophysics, Chinese Academy of Sciences
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- Wong, Teng-fong (författare)
- Chinese University of Hong Kong
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- Heap, Michael J. (författare)
- University of Strasbourg
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Vandamme, Matthieu (redaktör/utgivare)
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Dangla, Patrick (redaktör/utgivare)
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Pereira, Jean-Michel (redaktör/utgivare)
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Ghabezloo, Siavash (redaktör/utgivare)
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(creator_code:org_t)
- 2017-07-06
- 2017
- Engelska 7 s.
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Ingår i: Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics. - Reston, VA : American Society of Civil Engineers. - 9780784480779 ; , s. 1782-1788
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk bildbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Image Processing (hsv//eng)
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- ref (ämneskategori)
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