Uniqueness of Discrete Element Simulations in Monotonic Biaxial Shear Tests
Publication: International Journal of Geomechanics
Volume 14, Issue 5
Abstract
The discrete-element method (DEM) is an important tool for understanding the underlying microscale processes that influence macroscale behavior. For quasi-static simulations, numerically imaginary input parameters such as strain rate and damping constant can have significant influence on the resulting shear behavior, especially after the peak strength condition is attained. Consistent results require small unbalance forces among the particles, expressed as an unbalanced resultant force index. The unbalanced resultant force index is roughly proportional to the strain increment and inversely proportional to the average ratio of the particle overlaps and diameters and the ratio of the mean stress and the normal spring constant.
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Acknowledgments
The writers thank Professor M. Zaman, University of Oklahoma, for his insightful comments on this technical note.
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Information & Authors
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Published In
International Journal of Geomechanics
Volume 14 • Issue 5 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jun 14, 2013
Accepted: Sep 25, 2013
Published online: Sep 27, 2013
Discussion open until: Aug 28, 2014
Published in print: Oct 1, 2014
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