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Mechanical behaviour and failure of cohesive granular materials
Author(s) -
Delenne JeanYves,
El Youssoufi Moulay Saïd,
Cherblanc Fabien,
Bénet JeanClaude
Publication year - 2004
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.401
Subject(s) - cohesion (chemistry) , materials science , discrete element method , granular material , computer simulation , structural engineering , shear (geology) , compression (physics) , displacement (psychology) , composite material , mechanics , engineering , physics , psychology , psychotherapist , quantum mechanics
We investigate the stress–strain behaviour and failure of a cohesive granular material both by experiments and numerical simulations. The material is an assembly of aluminium rods glued together by means of an epoxy resin. The behaviour of cohesive bonds (force–displacement relationship, failure conditions) is characterized by performing simple loading tests (tension/compression, shear…) on a couple of rods. Then, this local behaviour is introduced in a numerical code based on a discrete element method in order to perform numerical compression tests on large samples. The validation of this approach was the main goal of the present investigation that is essentially achieved by a direct comparison between the numerical results and similar experimental tests. As a basic application, we derive the macroscopic cohesion and friction characteristics of random cohesive materials by systematic numerical simulations in a biaxial geometry. Copyright © 2004 John Wiley & Sons, Ltd.