Title

Constitutive Modeling for Transparent Granular Soils

RIS ID

127800

Publication Details

Xiao, Y., Sun, Y., Yin, F., Liu, H. & Xiang, J. (2017). Constitutive Modeling for Transparent Granular Soils. International Journal of Geomechanics, 17 (7), 04016150-1-04016150-22.

Abstract

Transparent granular soil was recently found to be greatly useful for observations of the internal deformation in geotechnical model tests. Therefore, it is necessary to investigate the stress-strain and stress-dilatancy behaviors of transparent granular soil and also to propose a constitutive model for this material. In this study, drained triaxial shearing tests were conducted to investigate the stress-strain and stress- dilatancy relations of transparent granular soil. It was found that this material showed a state-dependent stress-strain behavior similar to that of sands. A state-dependent constitutive model within the framework of the critical-state theory was proposed to describe the stress-strain and stress-dilatancy behaviors of this material. This model was found to well describe the stress-strain behaviors (e.g., strain softening and volumetric expansion) and the hook-shaped stress-dilatancy behaviors from the test data in both the Group A (for the calibration of material constants) and Group B (for the validation of model predictions) tests. In addition, this model was found to well capture the changes of the peakstate strength, peak-state dilatancy and peak-state strains with the state parameter.

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