Time-Dependent Mechanical Behavior of a Granular Medium Used in Laboratory Investigations
Publication: International Journal of Geomechanics
Volume 9, Issue 1
Abstract
The time-dependent mechanical response of an artificial granular medium consisting of glass beads is experimentally examined by performing one-dimensional creep tests on both saturated and dry specimens. The time-dependent compression of the oedometric sample, which is related to the internal rearrangement of the granular assembly, is modeled using an elastic-viscoplastic strain hardening constitutive model. The procedures used to identify the parameters defining the model are discussed; the incremental strain of the material is decomposed into reversible elastic and irreversible creep components. Finally, the capabilities of the proposed model in predicting the time-dependent response of the material are investigated through a comparison between experimental results and analogous results derived from computational modeling.
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Acknowledgments
The writers are indebted to the reviewers for their constructive comments that led to considerable improvements in the interpretation and presentation of the experimental data. The work described in this paper was supported by a NSERC Discovery Grant awarded to A. P. S. Selvadurai.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 9 • Issue 1 • January 2009
Pages: 1 - 8
Copyright
© 2009 ASCE.
History
Received: Dec 21, 2006
Accepted: Mar 17, 2008
Published online: Jan 1, 2009
Published in print: Jan 2009
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