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Amplitude-dependent attenuation of compressive waves in curved granular crystals constrained by elastic guides

Yang, Jinkyu and Dunatunga, Sachith and Daraio, Chiara (2012) Amplitude-dependent attenuation of compressive waves in curved granular crystals constrained by elastic guides. Acta Mechanica, 223 (3). pp. 549-562. ISSN 0001-5970. doi:10.1007/s00707-011-0568-x.

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We study the wave propagation in a curved chain of spherical particles constrained by elastic guides under the axial impact of a falling mass. We characterize the force transmission properties of the chain by varying the striker’s mass and the chain’s curvature. Experimental tests demonstrate amplitude-dependent attenuation of compressive waves propagating through the curved chain. In particular, we observe that the curved systems present an improved transmission of small dynamic disturbances relative to that of strong excitations, resulting from the close interplay between the granular particles and the softer elastic medium. We also find that the transmission of the compressive waves through the chains is dependent on the initial curvature imposed to the system. Numerical simulations, based on an approach that combines discrete element and finite element methods, corroborate the experimental results. The findings suggest that hybrid structures composed of granular particles and linear elastic media can be employed as new passive acoustic filtering materials that selectively transmit or mitigate excitations in a desired range of pressure amplitudes.

Item Type:Article
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Daraio, Chiara0000-0001-5296-4440
Additional Information:© 2011 Springer-Verlag. Received: 22 March 2011. Published online: 30 November 2011. We acknowledge the support of DARPA (Contract N. HR0011-10--0089, Dr. Jinendra Ranka) and the National Science Foundation, Grant Number CMMI-0844540 (Career). We also thank Stephane Job for helpful comments.
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Defense Advanced Research Projects Agency (DARPA)HR0011-10-C-0089
Issue or Number:3
Record Number:CaltechAUTHORS:20120430-110648937
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:30401
Deposited By: Ruth Sustaita
Deposited On:30 Apr 2012 18:23
Last Modified:09 Nov 2021 19:47

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