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Backscattering of Nonlinear Acoustic Impulses from Buried Inclusions in Granular Beds

Published online by Cambridge University Press:  01 February 2011


Marian Manciu
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, NY 14260–1500, USA
Surajit Sen
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, NY 14260–1500, USA
Alan J. Hurd
Affiliation:
Department 1841, Sandia National Laboratories, Albuquerque, NM 87185, USA

Abstract

Nonlinear acoustic impulses travel as weakly dispersive bundles of energy through 3-D, dry, granular assemblies. Such impulses can therefore be exploited to probe for buried objects in 3-D granular assemblies. In this article, we shall discuss the details of propagation of an impulse generated at the surface of a granular bed. The role of polydispersity will be briefly addressed. The calculations suggest that backscattered data, as received at predetermined locations at the surface, may be helpful in reconstructing an approximate image of the buried inclusion, as viewed from above.


Type
Research Article
Copyright
Copyright © Materials Research Society 2000

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References

[1] Manciu, M., Sen, S. and Hurd, A.J., in Sen, S. and Hunt, M.L. Eds. “The Granular StateMRS Symp. Proc. 627, pp (2000).Google Scholar
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[9] There is negligible mixing between backscattered impulses from periodically repeated objects.Google Scholar

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