Modeling Mechanical Behavior of Very Coarse Granular Materials
Publication: Journal of Engineering Mechanics
Volume 143, Issue 1
Abstract
A novel approach has been developed to predict the mechanical behavior of very coarse granular materials with a constitutive model, which considers both grain breakage and size effect. The behavior of granular assemblies is significantly influenced by particle breakage. A critical-state double-yield-surface model incorporating the change in the critical-state line and in elastic stiffness caused by grain breakage during loading has been adopted. The amount of grain breakage was estimated by extending the size effect theory on individual grains to granular assemblies. The results from earlier studies on granular materials with parallel gradations have been usefully exploited to calibrate and to validate the model. Comparisons between experiments and simulations suggest that this approach can predict the mechanical behavior of very coarse granular materials from test results performed on a finer fraction with a homothetic gradation.
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Acknowledgments
This research was financially supported by the National Natural Science Foundation of China (Grant Nos. 41372285, 51579179).
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Published In
Journal of Engineering Mechanics
Volume 143 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Apr 22, 2015
Accepted: Nov 20, 2015
Published online: Jan 19, 2016
Discussion open until: Jun 19, 2016
Published in print: Jan 1, 2017
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