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Granular State Effects on Wave Propagation

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Title Granular State Effects on Wave Propagation
 
Creator Hostler, Stephen R.
Brennen, Christopher E.
 
Subject Caltech Library Services
 
Description Sound and pressure wave propagation in a granular material is of interest not only for its intrinsic and practical value, but also because it provides a non-intrusive means of probing the state of a granular material. By examining wave speeds and attenuation, insight can be gained into the nature of the contacts between the particles. In the present paper, wave speeds and attenuation rates are first examined for a static granular bed for a variety of system parameters including particle size, composition and the overburden of the material above the measuring transducers. Agitation of the bed is then introduced by shaking the material vertically. This causes the bed to transition from a static granular state to a vibrofluidized state. The dilation of the bed allows for relative particle motion and this has a significant effect on the measured wave speeds and attenuation. Further, the fluid-like characteristics of the agitated bed distort the forcechain framework through which the waves are thought to travel. The consequences of bed consolidation, a natural result of shaking, are also examined.
 
Publisher Materials Research Society
 
Contributor Sen, Surajit
Hunt, Melany L.
Hurd, Alan J.
 
Date 2003
 
Type Book Section
PeerReviewed
 
Format application/pdf
 
Identifier http://authors.library.caltech.edu/212/1/HOS218.pdf
Hostler, Stephen R. and Brennen, Christopher E. (2003) Granular State Effects on Wave Propagation. In: Granular Material-Based Technologies. Materials Research Society Symposium Proceedings. Vol.Materi. No.759. Materials Research Society , Warrendale, PA, USA, pp. 73-78. ISBN 1 55899 696 6 http://resolver.caltech.edu/CaltechAUTHORS:HOSmrss03 <http://resolver.caltech.edu/CaltechAUTHORS:HOSmrss03>
 
Relation http://resolver.caltech.edu/CaltechAUTHORS:HOSmrss03
http://authors.library.caltech.edu/212/