Open AccessAnisotropic stress and shear wave velocity: DEM studies of a crystalline granular material
Author(s) -
J. O’Donovan,
Catherine O’Sullivan,
G. Marketos,
David Muir Wood
Publication year - 2015
Publication title -
géotechnique letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.845
H-Index - 28
ISSN - 2045-2543
DOI - 10.1680/jgele.15.00032
Subject(s) - anisotropy , shear (geology) , discrete element method , granular material , mechanics , shear velocity , wave propagation , shear stress , shear waves , plane wave , materials science , geotechnical engineering , physics , geology , optics , composite material , turbulence
Discrete element modelling (DEM) of a face-centred cubic assembly of spherical particles has been used to study the influence of anisotropic stress states on the shear wave velocity of a granular material. The shear waves were generated and detected in a way equivalent to the use of bender elements in laboratory testing. Comparisons are presented between the discrete element simulations and analytical and empirically derived methods of relating stiffness to the degree of confining stress anisotropy. The results confirm previous empirical observations that wave velocity is strongly influenced by the stresses in the direction of propagation and in the direction of oscillation of the shear wave. The wave velocity is, however, largely independent of the stress orthogonal to the plane containing the wave motion.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom