DEM of triaxial tests on crushable sand

Article English OPEN
de Bono, John P. ; McDowell, Glenn R. (2014)
  • Publisher: Springer Verlag
  • Journal: Granular Matter
  • Related identifiers: doi: 10.1007/s10035-014-0500-x
  • Subject: Materials Science(all) | Physics and Astronomy(all) | Mechanics of Materials

This paper presents simulations of high-pressure triaxial shear tests on a crushable sand. The discrete element method is used, featuring a large number of particles and avoiding the use of agglomerates. The triaxial model features a flexible membrane, therefore allowing realistic deformation, and a simple breakage mechanism is implemented using the octahedral shear stress induced in the particles. The simulations show that particle crushing is essential to replicate the realistic behaviour of sand (in particular the volumetric contraction) in high-pressure shear tests. The general effects of crushing during shear are explored, including its effects on critical states, and the influence of particle strength and confining pressure on the degree of crushing are discussed.
  • References (33)
    33 references, page 1 of 4

    1. Hardin, B.O.: Crushing of soil particles. J. Geotech. Eng. 111, 1177-1192 (1985)

    2. Yamamuro, J.A., Lade, P.V.: Drained sand behavior in axisymmetric tests at high pressures. J. Geotech. Eng. 122, 109-119 (1996)

    3. Bolton, M.D., Nakata, Y., Cheng, Y.P.: Micro- and macromechanical behaviour of DEM crushable materials. Géotechnique 58, 471-480 (2008)

    4. Lim, W.L., McDowell, G.R.: The importance of coordination number in using agglomerates to simulate crushable particles in the discrete element method. Géotechnique 57, 701-705 (2007)

    5. De Bono, J., McDowell, G., Wanatowski, D.: Discrete element modelling of a flexible membrane for triaxial testing of granular material at high pressures. Géotech. Lett. 2, 199-203 (2012)

    6. McDowell, G.R., de Bono, J.P.: On the micro mechanics of one-dimensional normal compression. Géotechnique 63, 895-908 (2013)

    7. Itasca: Particle Flow Code in 3 Dimensions. Itasca Consulting Group Inc, Minneapolis, Minnesota (2005)

    8. Cheng, Y.P., Bolton, M.D., Nakata, Y.: Crushing and plastic deformation of soils simulated using DEM. Géotechnique 54, 131-141 (2004)

    9. Åström, J.a, Herrmann, H.J.: Fragmentation of grains in a twodimensional packing. Eur. Phys. J. B Condens. Matter Complex Syst. 5, 551-554 (1998)

    10. Tsoungui, O., Vallet, D., Charmet, J.: Numerical model of crushing of grains inside two-dimensional granular materials. Powder Technol. 105, 190-198 (1999)

  • Metrics
    No metrics available
Share - Bookmark