Geomechanics and Engineering

  • 제9권6호
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  • Pages.815-827
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  • 2015
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

DEM analyses of the mechanical behavior of soil and soil-rock mixture via the 3D direct shear test

  • Xu, Wen-Jie (State Key Laboratory of Hydroscience and Hydraulic Engineering, Department of Hydraulic Engineering, Tsinghua University) ;
  • Li, Cheng-Qing (State Key Laboratory of Hydroscience and Hydraulic Engineering, Department of Hydraulic Engineering, Tsinghua University) ;
  • Zhang, Hai-Yang (State Key Laboratory of Hydroscience and Hydraulic Engineering, Department of Hydraulic Engineering, Tsinghua University)
  • 투고 : 2014.12.17
  • 심사 : 2015.10.31
  • 발행 : 2015.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The mechanical behavior of soil and soil-rock mixture is investigated via the discrete element method. A non-overlapping combination method of spheres is used to model convex polyhedron rock blocks of soil-rock mixture in the DEM simulations. The meso-mechanical parameters of soil and soil-rock interface in DEM simulations are obtained from the in-situ tests. Based on the Voronoi cell, a method representing volumtric strain of the sample at the particle scale is proposed. The numerical results indicate that the particle rotation, occlusion, dilatation and self-organizing force chains are a remarkable phenomena of the localization band for the soil and soil-rock mixture samples. The localization band in a soil-rock mixture is wider than that in the soil sample. The current research shows that the 3D discrete element method can effectively simulate the mechanical behavior of soil and soil-rock mixture.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of China

참고문헌

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  13. Liquid-Bridge Contact Model of Unsaturated Granular Materials and its Application in Discrete-Element Method vol.21, pp.9, 2021, https://doi.org/10.1061/(asce)gm.1943-5622.0002122