X-ray micro CT for studying strain localization in clay rocks under triaxial compression

Pierre Bésuelle (1) , Gioacchino Cinno Viggiani (2, 1) , Nicolas Lenoir (1) , Jacques Desrues (2, 1) , Michel Bornert (3)

1 3S - Laboratoire Sols, Solides, Structures
2 GéoMécanique
3 LMS - Laboratoire de mécanique des solides

The paper presents selected results from an experimental testing program recently performed at the ESRF, where high resolution, fast X-ray micro tomography was used to evaluate the onset and evolution of strain localization in Callovo-Oxfordian argillite under deviatoric loading. In situ micro tomography allowed detailed observations of strain localization at different load levels. X-ray CT was complimented with 3D digital image correlation to obtain a sequence of incremental 3D strain fields of a deforming specimen.

Mots clés: in situ micro tomography; synchrotron; triaxial compression; strain localization; cracks; 3D digital image correlation

Domaines: Mécanique des matériaux [physics.class-ph]

Pierre Bésuelle, Gioacchino Cinno Viggiani, Nicolas Lenoir, Jacques Desrues, Michel Bornert. X-ray micro CT for studying strain localization in clay rocks under triaxial compression. GEOX 2006 - 2nd International Workshop on X-Ray CT for geomaterials, 2006, Aussois, France. pp.35-52, ⟨10.1002/9780470612187.ch2⟩. ⟨hal-00156071⟩