X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression

Gioacchino Viggiani; Nicolas Lenoir; Pierre Bésuelle; Marco Di Michiel; Stefania Marello; Jacques Desrues; Mogens Kretzschmer

doi:10.1016/j.crme.2004.05.006

X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression

Presented by: Pierre Suquet

Gioacchino Viggiani ¹ ; Nicolas Lenoir ^1,²; Pierre Bésuelle ¹; Marco Di Michiel ³; Stefania Marello ¹; Jacques Desrues ¹; Mogens Kretzschmer ³

¹ Laboratoire 3S, UJF–INPG–CNRS, UMR 5521, BP 53, 38041 Grenoble, France
² Agence nationale pour la gestion des déchets radioactifs (ANDRA), Châtenay–Malabry, France
³ European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France

Comptes Rendus. Mécanique, Volume 332 (2004) no. 10, pp. 819-826.

Abstract
Résumé

This Note presents a few selected results of an experimental testing program carried out at the ESRF in Grenoble, France. X-ray microtomography (with a spatial resolution of 14 μm) has been used to evaluate the onset and evolution of shear banding in a fine-grained stiff soil under deviatoric loading. It allowed detailed observations of strain localization in a specimen during the test, including the presence of more than one shear zone and a varying degree of dilatancy and/or crack opening.

Cette Note présente une sélection de résultats obtenus lors d'une campagne d'essais expérimentale menée à l'ESRF de Grenoble. La microtomographie à rayons X a été utilisée afin d'étudier la naissance et l'évolution de bandes de cisaillement lors d'un chargement déviatorique dans un sol fin et raide. La reconstitution tomographique (avec une résolution spatiale de 14 μm) permet une observation détaillée du phénomène, montrant plusieurs zones de cisaillement et une évolution du niveau de dilatance et/ou d'ouverture de fissures.

Received: 2003-07-21
Accepted: 2004-05-25
Published online: 2004-08-10

DOI: 10.1016/j.crme.2004.05.006

Keywords: Soils, Shear bands, X-rays, Computed tomography, Clays, Experimental measurements
Mots-clés : Sols, Bandes de cisaillement, Rayons X, Tomographie, Argiles, Mesures expérimentales

Author's affiliations:

Gioacchino Viggiani ¹; Nicolas Lenoir ^{1, 2}; Pierre Bésuelle ¹; Marco Di Michiel ³; Stefania Marello ¹; Jacques Desrues ¹; Mogens Kretzschmer ³

¹ Laboratoire 3S, UJF–INPG–CNRS, UMR 5521, BP 53, 38041 Grenoble, France
² Agence nationale pour la gestion des déchets radioactifs (ANDRA), Châtenay–Malabry, France
³ European Synchrotron Radiation Facility, BP 220, 38043 Grenoble, France

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     author = {Gioacchino Viggiani and Nicolas Lenoir and Pierre B\'esuelle and Marco Di Michiel and Stefania Marello and Jacques Desrues and Mogens Kretzschmer},
     title = {X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {819--826},
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Gioacchino Viggiani; Nicolas Lenoir; Pierre Bésuelle; Marco Di Michiel; Stefania Marello; Jacques Desrues; Mogens Kretzschmer. X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression. Comptes Rendus. Mécanique, Volume 332 (2004) no. 10, pp. 819-826. doi : 10.1016/j.crme.2004.05.006. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2004.05.006/

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