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Dynamic stability analysis of undrained simple shear on water‐saturated granular soils
Author(s) -
Vardoulakis I.
Publication year - 1986
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.1610100206
Subject(s) - dilatant , geotechnical engineering , plasticity , instability , granular material , simple shear , soil water , shear (geology) , pore water pressure , triaxial shear test , soil mechanics , geology , shear strength (soil) , softening , effective stress , mechanics , materials science , soil science , composite material , physics , petrology
Dynamic stability of undrained, simple‐shear deformations on water‐saturated granular soil specimens is discussed. The soil is described by a 2D‐flow theory of plasticity for frictional and dilatant material. Contractant material becomes unstable (liquefies) at the state of maximum shear stress, whereas dilatant material becomes unstable after the state of maximum effective stress obliquity is reached in the softening regime of the background drained behaviour. In both cases the correct evolution equations for the growth coefficient of the instability are derived and compared with the results of the inertia‐free formulation of the problem.