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

Brown, N, Chen, J and Ooi, J 2014, 'A bond model for DEM simulation of cementitious materials and deformable structures', Granular Matter, vol. 16, no. 3, pp. 299-311.

Document type: Journal Article
Collection: Journal Articles

Title A bond model for DEM simulation of cementitious materials and deformable structures
Author(s) Brown, N
Chen, J
Ooi, J
Year 2014
Journal name Granular Matter
Volume number 16
Issue number 3
Start page 299
End page 311
Total pages 13
Publisher Springer
Abstract 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. © 2014 Springer-Verlag Berlin Heidelberg.
Subject Civil Geotechnical Engineering
Keyword(s) Bond model
Cementitious materials
Discrete element method (DEM)
Numerical modelling
DOI - identifier 10.1007/s10035-014-0494-4
Copyright notice © Springer-Verlag Berlin Heidelberg 2014
ISSN 1434-5021
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