By Jacques Desrues, Gioacchino Viggiani, Pierre Bésuelle
This publication brings jointly a complete of forty eight contributions (including five keynote papers) that have been offered on the second foreign Workshop at the program of X-ray CT for Geomaterials (GeoX 2006) held in Aussois, France, on 4-7 October, 2006.
The contributions conceal quite a lot of themes, from basic characterization of fabric habit to functions in geotechnical and geoenvironmental engineering. fresh advances of X-ray know-how, and software program also are mentioned. As such, this may be worthy examining for someone attracted to the applying of X-ray CT to geomaterials from either basic and utilized perspectives.Content:
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Extra info for Advances in X-ray Tomography for Geomaterials
1313-1320, 2004. , “X-ray microtomography for studying localized deformation in fine-grained geomaterials under triaxial compression”, C. R. Mécanique, vol. 332, p. 819-826, 2004. , “CT studies of brittle failure in Castlegate sandstone”, International Journal of Rock Mechanics and Mining Sciences, vol. 28, 1991, p. 441-448. , “Experimental study of the hydro-mechanical behaviour of the Callovo-Oxfordian argillite”, Applied Clay Science, vol. 26, no. 1-4, p. 325-336, 2004. Advances in X-ray Tomography f o r Geornaterials Edited by Jacques Desrues, Gioacchino Viggiani & Pierre BBsuelle Copyright 0 2006, ISTE Ltd.
The top and bottom rigid platens are enlarged and lubricated to minimize friction at the ends of the specimen. The specimen is enclosed in a thin neoprene sleeve sealed to the top and bottom platens, and placed in an oil-filled cell, which can sustain up to 10 MPa. A frictionless ram passes through the top of the cell and allows applying a stress deviator q = (σ a – σ r ), σ a and σ r being the axial and radial total stress, respectively. The axial strain, εa , is obtained by measuring the movement of the ram using a LVDT.
35, no. 3, p. 299-317, 1985. , “Shear Band Formation in a Fine Sand”, Proceedings of the 5th International Conference on Numerical Methods in Geomechanics, Nagoya, p. 517-522, 1985. K. (2001). “Strength of Two Structured Soils in Triaxial Compression”, International Journal for Numerical and Analytical Methods in Geomechanics, vol. 25, p. 131-153, 2001. Advances in X-ray Tomography f o r Geornaterials Edited by Jacques Desrues, Gioacchino Viggiani & Pierre BBsuelle Copyright 0 2006, ISTE Ltd. fr 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.
Advances in X-ray Tomography for Geomaterials by Jacques Desrues, Gioacchino Viggiani, Pierre Bésuelle