Elastoplastic Constitutive Model for Rockfill Materials Considering Particle Breakage
Publication: International Journal of Geomechanics
Volume 17, Issue 1
Abstract
Particle breakage has a great influence on stress-strain behaviors of rockfill materials. A new relative breakage was proposed for rockfill materials. A critical state line incorporating particle breakage was termed as a breakage critical state line (BCSL). It was found that the BCSL position of rockfill materials pertained to the relative breakage. An elastoplastic model considering state dependence and particle breakage was proposed for rockfill materials. The effect of particle breakage was incorporated into the proposed state parameter, dilatancy stress ratio, stress dilatancy relation, bounding stress ratio, and plastic modulus in the proposed model. The model considering particle breakage can well predict the stress-strain and particle-breakage behaviors of rockfill materials at various confining pressures.
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Acknowledgments
The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 51509024) and the Fundamental Research Funds for the Central Universities (Grant No. 106112015CDJXY200008).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: May 5, 2015
Accepted: Feb 23, 2016
Published online: Apr 26, 2016
Discussion open until: Sep 26, 2016
Published in print: Jan 1, 2017
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