Experimental Study of Isotropic and Anisotropic Constitutive Models
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 140, Issue 8
Abstract
This paper analyzes the validity of the yield surface and flow rule of several isotropic and anisotropic constitutive models. These aspects are studied based on drained triaxial tests, with a number of different stress paths in a computer-controlled stress path cell. The Cam clay, modified Cam clay, and models are used to study the isotropic behavior, whereas the anisotropic conditions are analyzed using the Melanie, MIT-E3, and S-CLAY1 models. Both under the isotropic and anisotropic conditions, the results indicate that the surface described by the undrained effective stress path is suitable for simulating the yield and plastic potential surfaces. In terms of isotropic behavior, the model is the most suitable for predicting the yield, whereas the plastic potential function is closely simulated by the yield function of the modified Cam clay model. For the anisotropic models studied, the MIT-E3 model provides a better approximation of the anisotropic behavior of the Santa Clara clay.
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Acknowledgments
The authors thank the institutions that financially supported the research: Centro de Investigação em Engenharia Civil (CIEC), Coimbra, Portugal; Centro de Investigação em Ciências da Construção (CICC), Coimbra, Portugal; and Fundação para a Ciência e a Tecnologia (FCT), Lisbon, Portugal (PTDC/ECM/101875/2008).
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 140 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 16, 2012
Accepted: Apr 11, 2014
Published online: May 14, 2014
Published in print: Aug 1, 2014
Discussion open until: Oct 14, 2014
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