Three-Dimensional Spherical DDA Method for Modeling Friction Problems
Publication: International Journal of Geomechanics
Volume 17, Issue 5
Abstract
Three-dimensional (3D) discontinuous deformation analysis (DDA) is very suitable for simulating large-displacement behavior of rock masses. One fundamental issue commonly encountered in 3D DDA is 3D friction problems. In this paper, a friction contact model based on 3D spherical DDA (SDDA) and the determination method of friction force direction is proposed for modeling 3D friction problems. Simulation results of three verification examples with available analytical solutions demonstrate the correctness of the friction contact model in 3D SDDA. Meanwhile, the simulation result of one application example, namely, a 3D-sphere natural-accumulation simulation, indicates that the friction problems of a 3D-sphere system can be modeled well by the proposed friction contact model. This work is helpful for solving 3D friction problems in discrete blocky systems.
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Acknowledgments
This work was supported by the Key Research Program of the Chinese Academy of Sciences (Grant KZZD-EW-05-03), the National Basic Research Program (973 Program) of China (Grants 2011CB710602, 2014CB046904, and 2014CB047101), and the China National Natural Science Foundation (Grants 51509242 and 51479191).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 5 • May 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 14, 2015
Accepted: Jun 16, 2016
Published online: Aug 18, 2016
Discussion open until: Jan 18, 2017
Published in print: May 1, 2017
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