European Journal of Environmental and Civil Engineering

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Contents Volurne 13 - No. 2/2009

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F All.URE AND BIFURCATION lN GEOMATERIALS THEORY, EXPERIMENTS AND MODELlNG

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131 Editorial- F. DARVE 133 Foreword - F. NICOT

135

Analyse 3D de la bifurcation dans les géomatériaux F. PRUNIER,F. LAOUAFA,F. DARVE

149 Experimental and numerical analyses of failure in very loose sands Analyses expérimentale et numérique des ruptures de sables très lâches A. DAOUADJI,F. DARVE,H. AL GALl, A. LEJEUNE,M. JRAD

167 Investigating instability in granular materials by means of a microstructural model

Etude des conditions d'instabilité dans les matériaux granulaires à l'aide d'un modèle microstructural

C.S. CHANG,P.-Y. HICHER,A. DAOUADJI

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130

203

235

EJECE- 13/2009, Failure and bifurcation in geomaterials 187 Analysis of failure occurrence frOIDdirect simulations

Analyse du développement de la rupture à partir de simulations directes

L. SmILLE,F. NICOT, F.-V. DONZÉ,F. DARVE

For any coostruc

question of failliTe is

1

society. This is pro established more thal question for the exi recent progresses ha' the questions ofuoiq

First the proper ~ is a bifurcation stati perturbations, the

1

regime to a dynam' uniqueness... Some experimental point method. The theore is also established.

Shear strength of granular materials

Résistance des matériaux granulaires au cisaillement F. RAOJAI,E. AZÉMA

219

Granular material response with respect to loading direction and material instability

Réponse d'un matériau granulaire par rapport à la direction de chargement et l'instabilité matérielle

R. WAN,M. PINHEIRO, Q. LI

Loss of controllability in unsaturated soils Perte de contrôlabilité en sols non saturés

G. BUSCARNERA,R.NoVA

However bifurc;

phase change, for' bifurcated branch( el bifurcation, proba~

the existence of gO, induces a large re considered in this for boundary valu responses oflabon

For non-asso(

example of such criteria have to e~

failures, geometri' plays a special ro instabilities) and localised failliTe considered quit characteristics of!

Indeed the ci and its linked fi domain with so generalised: the

and strains, i.e. :

states have to bi

Volume 13 - No. 2/2009

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