Constitutive Modeling for Transparent Granular Soils
Publication: International Journal of Geomechanics
Volume 17, Issue 7
Abstract
Transparent granular soil was recently found to be greatly useful for observations of the internal deformation in geotechnical model tests. Therefore, it is necessary to investigate the stress–strain and stress–dilatancy behaviors of transparent granular soil and also to propose a constitutive model for this material. In this study, drained triaxial shearing tests were conducted to investigate the stress–strain and stress–dilatancy relations of transparent granular soil. It was found that this material showed a state-dependent stress–strain behavior similar to that of sands. A state-dependent constitutive model within the framework of the critical-state theory was proposed to describe the stress–strain and stress–dilatancy behaviors of this material. This model was found to well describe the stress–strain behaviors (e.g., strain softening and volumetric expansion) and the hook-shaped stress–dilatancy behaviors from the test data in both the Group A (for the calibration of material constants) and Group B (for the validation of model predictions) tests. In addition, this model was found to well capture the changes of the peak-state strength, peak-state dilatancy and peak-state strains with the state parameter.
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Acknowledgments
The authors acknowledge the financial support from the National Science Foundation of China (Grants 51509024 and 51678094), the project funded by the China Postdoctoral Science Foundation (Grant 2016M590864), and the Fundamental Research Funds for the Central Universities (Grant 106112015CDJXY200008).
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Published In
International Journal of Geomechanics
Volume 17 • Issue 7 • July 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 29, 2016
Accepted: Oct 12, 2016
Published online: Nov 29, 2016
Discussion open until: Apr 29, 2017
Published in print: Jul 1, 2017
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