Particle-Based Discrete Element Modeling: Geomechanics Perspective
Publication: International Journal of Geomechanics
Volume 11, Issue 6
Abstract
This paper is a review of the use of particulate discrete element modeling (DEM) in geomechanics. The overall objective of the paper is to serve as an introduction to researchers and practitioners in geomechanics who are considering adopting DEM in their work or using the results of DEM simulations to guide other studies, for example, the development of constitutive models for continuum-based numerical analysis. It is hoped that prior converts to the use of DEM will also benefit from a relatively objective overview of current DEM use in geomechanics. The introductory sections present the background to the method and give an overview of the evolution of the use of particulate DEM in recent geotechnical research. The general principals of the algorithm are then presented, considering the types of particles typically used, the calculation of contact forces, and formulation of simulation boundary conditions. Some techniques available to interpret and postprocess of DEM results and provide the information to link the particle scale and overall response are outlined. Approaches used to validate and calibrate DEM models to verify that DEM simulation results representative of physical reality are discussed. An overview of the application of DEM modeling to field-scale problems is then presented. Finally the conclusions consider future developments in the area and emphasize the need to maintain quality in DEM simulations.
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Acknowledgments
Interactions with past and current collaborators have played a large role in the development of this paper. The most notable interactions were with Professor J. D. Bray and Dr. D. Doolin at U. C. Berkeley, Dr. L. Cui at University College Dublin, Mr. D. Barretto, Ms. G. Cheung and Professor M. Coop at Imperial College London. Dr. B. van Wachem of Imperial College London provided some very useful references from the chemical engineering literature.
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Published In
International Journal of Geomechanics
Volume 11 • Issue 6 • December 2011
Pages: 449 - 464
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© 2011 American Society of Civil Engineers.
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Received: Jul 28, 2009
Accepted: Jun 30, 2011
Published online: Jul 2, 2011
Published in print: Dec 1, 2011
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