Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Visualization of Shear Band in Sand Using Synchrotron Micro-Tomography
When a soil mass is sheared, deformations usually localize into narrow zones called shear bands that have certain thicknesses and inclination angles. In granular materials, the shear band is visible and it involves many particles in the direction perpendicular to the axis of the shear band. Intensive shearing takes place within a shear band which will influence particles orientation/interaction and the associated pore space. This paper presents a qualitative analysis of the shear band from three-dimensional (3D) images and reports accurate measurements of the shear band thickness. Synchrotron Micro-Tomography (SMT) was used to acquire high-resolution 3D images of a sand specimen sheared under plane strain condition. A prismatic specimen composed of F-75 Ottawa sand was compressed until failure under plane strain condition. It was then stabilized using a low viscosity epoxy. Few small cores were cut at regions of interest within the shear band and were scanned using SMT of Argonne National Laboratory. Shear band thickness and particle orientation within the shear band are presented and discussed.
Visualization of Shear Band in Sand Using Synchrotron Micro-Tomography
When a soil mass is sheared, deformations usually localize into narrow zones called shear bands that have certain thicknesses and inclination angles. In granular materials, the shear band is visible and it involves many particles in the direction perpendicular to the axis of the shear band. Intensive shearing takes place within a shear band which will influence particles orientation/interaction and the associated pore space. This paper presents a qualitative analysis of the shear band from three-dimensional (3D) images and reports accurate measurements of the shear band thickness. Synchrotron Micro-Tomography (SMT) was used to acquire high-resolution 3D images of a sand specimen sheared under plane strain condition. A prismatic specimen composed of F-75 Ottawa sand was compressed until failure under plane strain condition. It was then stabilized using a low viscosity epoxy. Few small cores were cut at regions of interest within the shear band and were scanned using SMT of Argonne National Laboratory. Shear band thickness and particle orientation within the shear band are presented and discussed.
Visualization of Shear Band in Sand Using Synchrotron Micro-Tomography
Hasan, Alsidqi (Autor:in) / Alshibli, Khalid (Autor:in) / Jaeger, Heinrich (Autor:in) / Rivers, Mark (Autor:in)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 1028-1035
07.03.2008
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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