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Non‐isothermal plasticity model for cyclic behaviour of soils
Author(s) -
Laloui L.,
Cekerevac C.
Publication year - 2007
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.629
Subject(s) - plasticity , constitutive equation , liquefaction , isothermal process , hardening (computing) , geotechnical engineering , soil water , critical state soil mechanics , shear (geology) , soil mechanics , mechanics , simple shear , materials science , triaxial shear test , geology , thermodynamics , structural engineering , engineering , finite element method , physics , composite material , soil science , layer (electronics)
On the one hand, it has been observed that liquefaction‐induced shear deformation of soils accumulates in a cycle‐by‐cycle pattern. On the other hand, it is known that heating could induce plastic hardening. This study deals with the constitutive modelling of the effect that heat may have on the cyclic mechanical properties of cohesive soils, a relatively new area of interest in soil mechanics. In this paper, after a presentation of the thermo‐mechanical framework, a non‐isothermal plasticity cyclic model formulation is presented and discussed. The model calibration is described based on data from laboratory sample tests. It includes numerical simulations of triaxial shear tests at various constant temperatures. Then, the model predictions are compared with experimentalresults and discussed in the final section. Both drained and undrained loading conditions are considered. The proposed constitutive model shows good ability to capture the characteristic features of behaviour. Copyright © 2007 John Wiley & Sons, Ltd.