Modeling Triaxial Test on Intact Rock Using Discrete Element Method with Membrane Boundary
Publication: Journal of Engineering Mechanics
Volume 135, Issue 9
Abstract
A new membrane boundary that applies realistic fluid confining pressure has been developed for modeling triaxial tests on intact rock by using the discrete element method. To realistically simulate the confining pressure, the new approach applies updated boundary force rather than a “wall” boundary. The applied forces only act on the boundary particles, which are identified and updated periodically. Comparisons between rigid-wall boundary and membrane boundary show that rigid-wall boundary can significantly alter the material response especially the material strength. The effect of confining pressures on the simulated results of triaxial tests is also investigated.
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Acknowledgments
The writers are grateful to Rio Tinto for sponsoring this research work under the project “Three-dimensional rock-fall analysis with impact fragmentation and fly-rock modeling.”
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 9 • September 2009
Pages: 1029 - 1037
Copyright
© 2009 ASCE.
History
Received: Jun 24, 2008
Accepted: Dec 22, 2008
Published online: Mar 6, 2009
Published in print: Sep 2009
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