Unified Expression of Rotational Hardening in Clay Plasticity
Publication: International Journal of Geomechanics
Volume 16, Issue 6
Abstract
Rotational hardening is the constitutive ingredient of clay plasticity models that allows rotation of the yield surface in stress space to simulate, more realistically than isotropic models, the stress-strain response under different loading conditions. Based on well-known rotational hardening rules and extensive experimental results, a new unified expression of rotational hardening is proposed in this work, in which the parameters of the unified expression can be determined directly. The proposed rotational hardening expression was imported into a clay model and adopted to simulate the stress-strain behavior of different clays. The simulated results and the experimental results were compared to analyze the influence of the equilibrium values on the stress-strain behaviors. The comparisons show that the constitutive model with the proposed rotational hardening rule had good predictive capability for triaxial tests under different loading paths.
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Acknowledgments
The financial support from the National Natural Science Foundation of China (NSFC Grant Nos. 41330633 and 41372282) is gratefully acknowledged.
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Published In
International Journal of Geomechanics
Volume 16 • Issue 6 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Mar 12, 2015
Accepted: Dec 23, 2015
Published online: Feb 24, 2016
Discussion open until: Jul 24, 2016
Published in print: Dec 1, 2016
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