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Volume 40 Issue 4
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ZHANG Ke-fen, ZHANG Sheng, TENG Ji-dong, SHENG Dai-chao. Influences of self-organization of granular materials on particle crushing based on discrete element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(4): 743-751. DOI: 10.11779/CJGE201804019
Citation: ZHANG Ke-fen, ZHANG Sheng, TENG Ji-dong, SHENG Dai-chao. Influences of self-organization of granular materials on particle crushing based on discrete element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(4): 743-751. DOI: 10.11779/CJGE201804019
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Influences of self-organization of granular materials on particle crushing based on discrete element method

  • 1. School of Civil Engineering, Central South University, Changsha 410075, China;
    2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China;
    3. School of Engineering, The University of Newcastle, NSW2308, Australia;

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  • Received Date: January 17, 2017
  • Published Date: April 24, 2018
    Graphical Abstract
    • Abstract
  • Starting from the Apollonian sphere packing method in mathematics, four kinds of self-organization of breakage are established, and the linear expansion method is introduced to guarantee the mass conservation. On this basis, the numerical experiments on different self-organizations are carried out, and the influences of self-organization on gradation evolution and macro and micro mechanical behaviors of granular materials are studied. It is found that the fractal dimension and the average inter-particle stress decrease with the increase of fragment number, while the relative breakage Br and the compressibility increase with the increase of particle number in the self-organization. The anisotropic rose diagram of contact orientation and contact normal force show that the larger the number of particles in the self-organization is, the lower the anisotropy of the specimens at the end of loading is. In addition, the number of particle contact increases with the increase of self-organized particles, while the normal contact force decreases. Furthermore, the probability distributions of coordination number and contact force are also closely related to the self-organization of fragmentation.
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    • References (25)
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