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Evaluation of a Predictive Constitutive Model for Sands Jos E. Andrade, A.M.ASCE1

Summary: Evaluation of a Predictive Constitutive Model for Sands
Josť E. Andrade, A.M.ASCE1
; and Kirk C. Ellison, S.M.ASCE2
Abstract: In this technical note, an evaluation of the robustness and predictive ability of a constitutive model for sands is performed. The
model is shown to capture the main features of sand behavior under both drained and undrained monotonic loadings for a wide range of
relative densities and stress paths. The main contribution of this technical note is to evaluate a robust, yet simple, constitutive framework
based on a solid theoretical basis that fulfils the most fundamental requirement of any useful constitutive law: accurate predictions.
DOI: 10.1061/ ASCE 1090-0241 2008 134:12 1825
CE Database subject headings: Sand; Constitutive models; Loads; Predictions; Soil properties; Parameters.
In this technical note, a simplified version of the model developed
by Borja and Andrade 2006 and Andrade and Borja 2006 is
evaluated. The constitutive model is an offspring of the rigid-
plastic model proposed by Jefferies 1993 with several improve-
ments, including crucial features such as: a hyperelastic region,
bulk and shear moduli dependent on the effective pressure, de-
pendence of plastic flow on all three stress invariants, nonasso-
ciativity, and large deformations capabilities. The model has been
successfully implemented into a general purpose finite element
code and has been coupled with fluid flow to perform simulations


Source: Andrade, Jose - Department of Civil and Environmental Engineering, Northwestern University


Collections: Engineering