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Strength criterion for cross-anisotropic sand under general stress conditions

Lü, Xilin and Huang, Maosong and Andrade, José E. (2016) Strength criterion for cross-anisotropic sand under general stress conditions. Acta Geotechnica, 11 (6). pp. 1339-1350. ISSN 1861-1125. https://resolver.caltech.edu/CaltechAUTHORS:20161109-073532052

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Abstract

By incorporating the fabric effect and Lode’s angle dependence into the Mohr–Coulomb failure criterion, a strength criterion for cross-anisotropic sand under general stress conditions was proposed. The obtained criterion has only three material parameters which can be specified by conventional triaxial tests. The formula to calculate the friction angle under any loading direction and intermediate principal stress ratio condition was deduced, and the influence of the degree of the cross-anisotropy was quantified. The friction angles of sand in triaxial, true triaxial, and hollow cylinder torsional shear tests were obtained, and a parametric analysis was used to detect the varying characteristics. The friction angle becomes smaller when the major principal stress changes from perpendicular to parallel to the bedding plane. The loading direction and intermediate principal stress ratio are unrelated in true triaxial tests, and their influences on the friction angle can be well captured by the proposed criterion. In hollow cylinder torsional shear tests with the same internal and external pressures, the loading direction and intermediate principal stress ratio are related. This property results in a lower friction angle in the hollow cylinder torsional shear test than that in the true triaxial test under the same intermediate principal stress ratio condition. By comparing the calculated friction angle with the experimental results under various loading conditions (e.g., triaxial, true triaxial, and hollow cylinder torsional shear test), the proposed criterion was verified to be able to characterize the shear strength of cross-anisotropic sand under general stress conditions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s11440-016-0479-zDOIArticle
http://link.springer.com/article/10.1007%2Fs11440-016-0479-zPublisherArticle
http://rdcu.be/tsZIPublisherFree ReadCube access
ORCID:
AuthorORCID
Lü, Xilin0000-0003-1045-6047
Additional Information:© 2016 Springer-Verlag Berlin Heidelberg. First Online: 02 September 2016.
Subject Keywords:Cross-anisotropy; Friction angle; Hollow cylinder torsional shear test; Intermediate principal stress ratio; Sand; True triaxial test
Issue or Number:6
Record Number:CaltechAUTHORS:20161109-073532052
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20161109-073532052
Official Citation:Lü, X., Huang, M. & Andrade, J.E. Acta Geotech. (2016) 11: 1339. doi:10.1007/s11440-016-0479-z
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71855
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Nov 2016 18:07
Last Modified:09 Mar 2020 13:19

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