A comparative assessment and unification of bond models in DEM simulations

Xizhong Chen*, Di Peng, John P. Morrissey, Jin Ooi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Bonded contact models have been increasingly used in the discrete element method (DEM) to study cemented and sintered particulate materials in recent years. Several popular DEM bond models have been proposed in the literature; thus it is beneficial to assess the similarities and differences between the different bond models before they are used in simulations. This paper identifies and discusses two fundamental types of bond models: the Spring Bond Model where two bonded particles are joined by a set of uniform elastic springs on the bond’s cross-section, and the Beam Bond Model in which a beam is used to connect the centres of two particles. A series of cantilever beam bending simulation cases were carried out to verify the findings and assess the strength and weakness of the bond models. Despite the numerous bond models described in the literature, they can all be considered as a variation of these two fundamental model types. The comparative evaluation in this paper also shows that all the bond models investigated can be unified to a general form given at a predefined contact point location.
Original languageEnglish
Article number29
Number of pages20
JournalGranular Matter
Volume24
Issue number29
Early online date15 Dec 2021
DOIs
Publication statusPublished - 2 Feb 2022

Keywords / Materials (for Non-textual outputs)

  • Beam bond model
  • Bonded-particle model
  • Parallel bond model
  • Cantilever beam
  • Fracture
  • Discrete element method
  • DEM

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