Journal
COMPUTERS AND GEOTECHNICS
Volume 143, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2021.104606
Keywords
Granular material; Partially saturated; Anisotropy; DEM; Triaxial shear test
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Funding
- Austra-lian Research Council [LP160100649]
- Australian Research Council [LP160100649] Funding Source: Australian Research Council
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This study presents a micromechanical investigation on the characteristics of shear-induced anisotropy in granular media under different saturation states. The effects of suctions on anisotropy are explored, and it is found that mechanical anisotropy plays a dominant role in providing shear resistance.
This study presents a micromechanical study on the characteristics of shear-induced anisotropy in granular media under various saturation states. A series of unsaturated triaxial compression tests under the full range of degree of saturation are performed by using Discrete Element Method (DEM). The effect of the suctions on the characteristics of anisotropy is illustrated and discussed. Good agreements between anisotropy and stress ratio are observed for saturated and unsaturated states if skeleton contact stress is adopted. With the increase of the suctions, the weight of fabric tensor anisotropy decreases while the weight of anisotropy related to normal forces increases. The mechanical anisotropy plays a dominant role in providing shear resistance for the full saturation range.
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