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Generalized plasticity state parameter‐based model for saturated and unsaturated soils. Part 1: Saturated state
Author(s) -
Manzanal Diego,
Fernández Merodo José Antonio,
Pastor Manuel
Publication year - 2010
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.961
Subject(s) - plasticity , constitutive equation , granular material , geotechnical engineering , modulus , dependency (uml) , overburden pressure , pore water pressure , soil water , flow (mathematics) , mechanics , geology , mathematics , statistical physics , materials science , engineering , structural engineering , geometry , physics , finite element method , soil science , composite material , systems engineering
The behavior of granular materials is known to depend on its loose or dense nature, which in turns depends both on density and confining pressure. Many models developed in the past require the use of different sets of constitutive parameters for the same material under different confining pressures. The purpose of this paper is to extend a basic generalized plasticity model for sands proposed by Pastor, Zienkiewicz and Chan by modifying the main ingredients of the model flow—rule, loading–unloading discriminating direction and plastic modulus—to include a dependency on the state parameter. The proposed model is tested against the available experimental data on three different sands, using for each of them a single set of material parameters, finding a reasonably good agreement between experiments and predictions. Copyright © 2010 John Wiley & Sons, Ltd.