EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Section||Particle simulations and particle-based methods|
|Published online||30 June 2017|
Linear and nonlinear elastic properties of dense granular packings: a DEM exploration
1 Chair of Building Physics, ETHZ, Wolfgang-Paulistrasse 15, CH-8093 Zurich, Switzerland
2 Laboratory for Building Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
3 Solid Earth Geophysics Group, Los Alamos National Laboratory, MS D443, Los Alamos, 87545 New Mexico, USA
4 Department of Physics, University of Nevada, Reno ( NV), USA
5 Institut Langevin, ESPCI ParisTech, CNRS UMR 7587 - 1 rue Jussieu, 75005 Paris, France
* e-mail: firstname.lastname@example.org
Published online: 30 June 2017
Discrete Element Method modeling is used to study the frequency spectrum of particle motion in dense 3D packings of glass beads with Hertz-Mindlin contacts. Frequency sweeps show a dependency of the resonant frequencies on the drive amplitude and confining stress on the system, showing material changes in the system. The amplitude dependency of the second thickness mode 3λ/4 as identified by the internal strain field scales as f ∝ σ1/6 while the confining stress dependency scales as f ∝ σ 2/3, as predicted by Hertzian theory.
© The Authors, published by EDP Sciences, 2017
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