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Discrete simulations of a triaxial compression test for sand by DEM
Author(s) -
Kozicki Jan,
Tejchman Jacek,
Mühlhaus HansBernd
Publication year - 2014
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.2285
Subject(s) - discrete element method , spheres , materials science , void ratio , mechanics , geotechnical engineering , triaxial shear test , grain size , granular material , stiffness , void (composites) , particle size , particle size distribution , shear (geology) , direct shear test , surface finish , composite material , geology , physics , paleontology , astronomy
SUMMARY A quasi‐static homogeneous drained triaxial compression test on cohesionless sand under constant lateral pressure was simulated using a three‐dimensional discrete element method. Grains were modelled by means of particle clusters composed of rigid spheres or spheres with contact moments imitating irregular particle shapes. Attention was paid to the effect of initial void ratio and grain shape mixture on the shear strength, volume changes, force chains, kinetic, elastic and dissipated energies. In addition, the effect of the mean grain size, grain size distribution, grain size range, specimen size and roughness and stiffness of boundaries was numerically analysed in initially dense sand. Some numerical results were compared with available experimental results. Copyright © 2014 John Wiley & Sons, Ltd.