Prediction/Verification of Particle Motion in One Dimension with the Discrete-Element Method
Publication: International Journal of Geomechanics
Volume 7, Issue 5
Abstract
Although the availability of discrete-element method (DEM) codes has improved, the need still exists to solve simple verification problems to obtain an understanding of these codes. Different DEM codes may have subtle differences in the manner in which the method is implemented, and the significance of these differences may be problem dependent. This paper investigates a series of simple, one and two-particle contact problems. These problems, which employ various types of damping, are shown to be equivalent to classical one-dimensional vibration problems. The solutions are discussed in the context of the DEM, and results from the DEM are shown to compare very well with the classical solutions. It is demonstrated that results from a well-known commercial two-dimensional code (PFC2D) and the open source three-dimensional code (YADE) yield identical solutions to these problems provided the problem solution process is manipulated properly. A discussion of the differences in how gravity and damping are implemented may be of interest to users of PFC2D.
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Acknowledgments
This work was supported in part by Grant No. DOEDE-FG05-88-ER-13869 of the U.S. Department of Energy and by the cooperative agreement between the University of Tennessee and the Oak Ridge National Laboratory.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 7 • Issue 5 • September 2007
Pages: 344 - 352
Copyright
© 2007 ASCE.
History
Received: Jun 9, 2006
Accepted: Nov 27, 2006
Published online: Sep 1, 2007
Published in print: Sep 2007
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