A bond model for DEM simulation of cementitious materials and deformable structures

Nicholas J. Brown, Jian-Fei Chen, Jin Y. Ooi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

There is an increasing use of the discrete element method (DEM) to study cemented (e.g. concrete and rocks) and sintered particulate materials. The chief advantage of the DEM over continuum based techniques is that it does not make assumptions about how cracking and fragmentation initiate and propagate, since the DEM system is naturally discontinuous. The ability for the DEM to produce a realistic representation of a cemented granular material depends largely on the implementation of an inter-particle bonded contact model. This paper presents a new bonded contact model based on the Timoshenko beam theory which considers axial, shear and bending behaviour of the bond. The bond model was first verified by simulating both the bending and dynamic response of a simply supported beam. The loading response of a concrete cylinder was then investigated and compared with the Eurocode equation prediction. The results show significant potential for the new model to produce satisfactory predictions for cementitious materials. A unique feature of this model is that it can also be used to accurately represent many deformable structures such as frames and shells, so that both particles and structures or deformable boundaries can be described in the same DEM framework.

Original languageEnglish
Pages (from-to)299-311
Number of pages13
JournalGranular Matter
Issue number3
Early online date3 Apr 2014
Publication statusPublished - 30 Jun 2014

Keywords / Materials (for Non-textual outputs)

  • Discrete element method (DEM)
  • Bond model
  • Cementitious materials
  • Numerical modelling
  • ROCK


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