Skip to main content
placeholder image

DEM modelling of granular materials during cyclic loading

Conference Paper


Abstract


  • This paper summarises the potential of the Discrete Element Method (DEM) to simulate the behaviour of granular materials under cyclic loading conditions. DEM simulations were carried out on two different assemblies of granular particles (e.g. sand and ballast). It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. liquefaction, post liquefaction and cyclic densification of ballast) similar to the laboratory experiments. Moreover, an instrumented track at Bulli, NSW, Australia, was modeled using DEM to examine the lateral movement of granular materials, including the particle breakage during cyclic loading. The results of these simulations captured the lateral response of ballast in accordance with the field observations and the evolution of micro-mechanical parameters such as a distribution of the contact force and bond force developed during cyclic loading is presented to explain the mechanism of particle breakage.

UOW Authors


  •   Vinod, J S. (external author)
  •   Indraratna, Buddhima N. (external author)
  •   Sitharam, T G (external author)

Publication Date


  • 2013

Citation


  • Vinod, J., Indraratna, B. & Sitharam, T. (2013). DEM modelling of granular materials during cyclic loading. Seventh International Conference On Case Histories In Geotechnical Engineering (pp. 1-10). United States: Missouri University of Science and Technology.

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/725

Start Page


  • 1

End Page


  • 10

Place Of Publication


  • United States

Abstract


  • This paper summarises the potential of the Discrete Element Method (DEM) to simulate the behaviour of granular materials under cyclic loading conditions. DEM simulations were carried out on two different assemblies of granular particles (e.g. sand and ballast). It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. liquefaction, post liquefaction and cyclic densification of ballast) similar to the laboratory experiments. Moreover, an instrumented track at Bulli, NSW, Australia, was modeled using DEM to examine the lateral movement of granular materials, including the particle breakage during cyclic loading. The results of these simulations captured the lateral response of ballast in accordance with the field observations and the evolution of micro-mechanical parameters such as a distribution of the contact force and bond force developed during cyclic loading is presented to explain the mechanism of particle breakage.

UOW Authors


  •   Vinod, J S. (external author)
  •   Indraratna, Buddhima N. (external author)
  •   Sitharam, T G (external author)

Publication Date


  • 2013

Citation


  • Vinod, J., Indraratna, B. & Sitharam, T. (2013). DEM modelling of granular materials during cyclic loading. Seventh International Conference On Case Histories In Geotechnical Engineering (pp. 1-10). United States: Missouri University of Science and Technology.

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/725

Start Page


  • 1

End Page


  • 10

Place Of Publication


  • United States