Investigation of localized deformation in partially saturated sand under triaxial compression using microfocus X-ray CT with digital image correlation

被引：124

作者：

Higo, Yosuke ^{[1
]}

Oka, Fusao ^{[1
]}

Sato, Tomohiro ^{[1
]}

Matsushima, Yoshiki ^{[1
]}

Kimoto, Sayuri ^{[1
]}

机构：

[1] Kyoto Univ, Dept Civil & Earth Resources Engn, Kyoto 6068501, Japan

来源：

SOILS AND FOUNDATIONS | 2013年 / 53卷 / 02期

关键词：

Localized deformation; Partially saturated sand; Quantification; Microfocus X-ray CT; Image analysis; International Geotechnical Classification Number: D06; STRAIN LOCALIZATION; BEHAVIOR; TESTS;

D O I：

10.1016/j.sandf.2013.02.001

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

In this paper, localized deformation in partially saturated sand was investigated quantitatively using microfocus X-ray computed tomography (CT) and an image analysis of the CT images. Triaxial compression tests on a partially saturated dense Toyoura sand specimen were carried out under a low confining pressure and under drained conditions for both air and water. The development of localized deformation was observed macroscopically using microfocus X-ray CT, and the displacement field over the entire specimen was quantified by an image analysis of the CT images with the digital image correlation (DIC) technique. The progressive development of shear bands is discussed with reference to these images. In addition, the region of localization was observed microscopically by partial CT scanning on a micron scale with high spatial resolution. Changes in the particulate structures are also discussed herein. The DIC image analysis of the partial CT images provided a microscopic displacement field and indicated that very fine localized shear deformation developed before the shear bands had become visible in the macroscopic investigation. (C) 2013 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：181 / 198

页数：18

共 41 条

[11] Discrete and continuum analysis of localised deformation in sand using X-ray μCT and volumetric digital image correlation [J].

Hall, S. A. ;

Bornert, M. ;

Desrues, J. ;

Pannier, Y. ;

Lenoir, N. ;

Viggiani, G. ;

Besuelle, P. .

GEOTECHNIQUE, 2010, 60 (05) :315-322

[12] Experimental assessment of 3D particle-to-particle interaction within sheared sand using synchrotron microtomography [J].

Hasan, A. ;

Alshibli, K. A. .

GEOTECHNIQUE, 2010, 60 (05) :369-379

[13]

Hicher P.Y., 1994, COMPUT GEOTECH, V16, P22

[14]

Higo, 2010, P 3 INT C XRAY CT GE, P43

[15] Three-dimensional strain localization of water-saturated clay and numerical simulation using an elasto-viscoplastic model [J].

Higo, Y. ;

Oka, F. ;

Kodaka, T. ;

Kimoto, S. .

PHILOSOPHICAL MAGAZINE, 2006, 86 (21-22) :3205-3240

[16]

Higo Y., 2011, P 9 INT WORKSH BIF D, P35

[17] STUDY OF STRAIN LOCALIZATION AND MICROSTRUCTURAL CHANGES IN PARTIALLY SATURATED SAND DURING TRIAXIAL TESTS USING MICROFOCUS X-RAY CT [J].

Higo, Yosuke ;

Oka, Fusao ;

Kimoto, Sayuri ;

Sanagawa, Taisuke ;

Matsushima, Yoshiki .

SOILS AND FOUNDATIONS, 2011, 51 (01) :95-111

[18]

HOUNSFIELD GN, 1972, Patent No. 1283915

[19]

Kodaka T, 2001, PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON SOIL MECHANICS AND GEOTECHNICAL ENGINEERING VOLS 1-3, P167

[20] Volumetric digital image correlation applied to X-ray microtomography images from triaxial compression tests on argillaceous rock [J].

Lenoir, N. ;

Bornert, M. ;

Desrues, J. ;

Besuelle, P. ;

Viggiani, G. .

STRAIN, 2007, 43 (03) :193-205

← 1 2 3 4 5 →