Journal of the Mechanics and Physics of Solids, ( ISI ), Volume (52), No (10), Year (2004-10) , Pages (2235-2262)

Title : ( Axisymmetric bifurcation analysis in soils by the tangential-subloading surface model )

Authors: Mehdi Khojastehpour , Koichi Hashiguchi ,

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Abstract

This article discusses localized bifurcation modes corresponding to shear band formation and diffuse bifurcation modes corresponding to bulge formation for cylindrical soil specimen subjected to an axisymmetric load under undrained conditions. We employ the tangential-subloading surface model, which exhibits the characteristic regimes of the governing equations: elliptic, hyperbolic and parabolic. Also, conditions for shear band formation, shear band inclination, diffuse bulging formation, and the long and short wavelength limits of diffuse bulging modes are discussed in relation to material properties and their state of stress, i.e. the stress ratio and the normal-yield ratio. Tangential-plastic strain rate term is required for the analyses of shear band and diffuse bulging. The shear band and the diffuse bulging are generated in not only normal-yield but also subyield states and they are severely affected by the normal-yield ratio describing the degree of approach to the normal-yield state.

Keywords

, Shear band; Diffuse bulging; Subloading surface model; Constitutive behavior; Elastic, plastic material; Granular material; Stability and bifurcation
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@article{paperid:1012471,
author = {Khojastehpour, Mehdi and Koichi Hashiguchi},
title = {Axisymmetric bifurcation analysis in soils by the tangential-subloading surface model},
journal = {Journal of the Mechanics and Physics of Solids},
year = {2004},
volume = {52},
number = {10},
month = {October},
issn = {0022-5096},
pages = {2235--2262},
numpages = {27},
keywords = {Shear band; Diffuse bulging; Subloading surface model; Constitutive behavior; Elastic- plastic material; Granular material; Stability and bifurcation},
}

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%0 Journal Article
%T Axisymmetric bifurcation analysis in soils by the tangential-subloading surface model
%A Khojastehpour, Mehdi
%A Koichi Hashiguchi
%J Journal of the Mechanics and Physics of Solids
%@ 0022-5096
%D 2004

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