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Predictions of large stress reversals in true triaxial tests on cross‐anisotropic sand
Author(s) -
Gutta Suresh K.,
Yamamuro Jerry A.,
Lade Poul V.
Publication year - 2008
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.753
Subject(s) - anisotropy , hardening (computing) , isotropy , constitutive equation , geotechnical engineering , kinematics , triaxial shear test , mechanics , geology , strain hardening exponent , materials science , structural engineering , physics , engineering , classical mechanics , finite element method , composite material , optics , petrology , layer (electronics) , shear (geology)
A rotational kinematic hardening constitutive model with the capability of predicting the behavior of soil during three‐dimensional stress reversals has been developed. An existing elasto‐plastic constitutive model, the Single Hardening Model, utilizing isotropic hardening serves as the basic framework in these formulations. The framework of the kinematic hardening model was discussed in a companion paper. The previously proposed cross‐anisotropic Single Hardening Model is added to the present kinematic hardening mechanism to capture inherent anisotropy of sands in addition to the stress reversals. This model involves 13 parameters, which can be determined from simple laboratory experiments, such as isotropic compression, drained triaxial compression and triaxial extension tests. The results from a series of true triaxial tests with large three‐dimensional stress reversals performed on medium dense cross‐anisotropic Santa Monica Beach sand are employed for comparison with predictions. Copyright © 2008 John Wiley & Sons, Ltd.