Microscopic Evaluation of Strain Distribution in Granular Materials during Shear
| Autor: | Bashar Alramahi, Khalid A. Alshibli |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Journal of Geotechnical and Geoenvironmental Engineering. 132:80-91 |
| ISSN: | 1943-5606 1090-0241 |
| DOI: | 10.1061/(asce)1090-0241(2006)132:1(80) |
| Popis: | The evolution of local strains during shear of particles of a granular material is presented in this paper. A cylindrical specimen composed of 6.5-mm spherical plastic particles was loaded under an axisymmetric triaxial loading condition. Computed tomography (CT) was used to acquire three-dimensional images of the specimen at three shearing stages. The high-resolution CT images were used to identify the 3D coordinates of 400 particles. Nine strain components (normal, shear, and rotation), rotation angles, and local dilatancy angles for particle groups were calculated, and their frequency distribution histograms are presented and discussed. It was found that there is no preferred shear direction, and the standard deviation values for shear strain components ( exy , exz , and eyz ) were almost equal for the specific test shearing stage. Shear strains as high as 25.6% were recorded for some particle groups. Furthermore, granular particle groups rotated in the 3D space with almost equal amounts of rotation st... |
| Databáze: | OpenAIRE |
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