Small-amplitude acoustics in bulk granular media
Author(s)Valenza, John J.; Johnson, David L.; Henann, David Lee; Kamrin, Kenneth N.
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We propose and validate a three-dimensional continuum modeling approach that predicts small-amplitude acoustic behavior of dense-packed granular media. The model is obtained through a joint experimental and finite-element study focused on the benchmark example of a vibrated container of grains. Using a three-parameter linear viscoelastic constitutive relation, our continuum model is shown to quantitatively predict the effective mass spectra in this geometry, even as geometric parameters for the environment are varied. Further, the model's predictions for the surface displacement field are validated mode-by-mode against experiment. A primary observation is the importance of the boundary condition between grains and the quasirigid walls.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
Physical Review E
American Physical Society
Henann, David L., John J. Valenza, David L. Johnson, and Ken Kamrin. “Small-amplitude acoustics in bulk granular media.” Physical Review E 88, no. 4 (October 2013). © 2013 American Physical Society
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