Advances in Computed Tomography for Geomaterials: GeoX 2010

Visualization of Strain Localization and Microstructures in Soils during Deformation Using Microfocus X-ray CT

Y. Higo¹ — F. Oka¹ — S. Kimoto¹ — T. Sanagawa² — M. Sawada³ — T. Sato¹ — Y. Matsushima¹

¹ Department of Civil and Earth Resources Engineering, Kyoto UniversityC1 Bd., Kyotodaigaku-katsura 4, Nishikyo-ku, Kyoto, 615-8540, [e-mail]

 

² Department of Civil and Earth Resources Engineering, Kyoto University(Presently, Railway Technical Research Institute) Kokubunji-shi, Tokyo, 185-8540, [e-mail]

 

³ Department of Civil and Earth Resources Engineering, Kyoto University(Presently, Taisei Corporation, Technology Center) Totsuka-ku, Yokohama, 245-0051, [e-mail]

ABSTRACT. It is well known that strain localization is an important issue for the onset of failure problems. In order to clarify the mechanism of failure, it is necessary to visualize the strain localization and microstructure changes in detail. The aim of this paper is to observe strain localization behavior and microstructures of soils during deformation process using a microfocus X-ray CT. Strain localization of unsaturated Toyoura sand specimen and Maruyamagawa clay specimen during compression tests have been observed and discussed. In addition, microstructures of sands have been visualized by partial CT scan. In the ...