Nonlinear phononic crystals based on chains of disks alternating with toroidal structures
- Creators
- Spadoni, A.
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Daraio, C.
- Hurst, W.
- Brown, M.
Abstract
We study experimentally the acoustic response of a load-bearing, phononic crystal composed of alternating steel disks, and polytetrafluoroethylene o-rings under precompression. The crystal allows for axial, rocking, and shear-polarized wavemodes when excited by a broad-band signal applied off-axis. Finite element analysis is employed to determine the system's wave modes. The nonlinear interaction between disks and o-rings supports a dynamic response that is tunable with variations in static precompression, leading to controllable frequency shifts in a large band gap. A modal analysis reveals that four of the six principal wave modes are susceptible to external precompression while two modes are not.
Additional Information
© 2011 American Institute of Physics. Received 26 October 2010; accepted 23 February 2011; published online 18 April 2011. We thank Allen Bronowicki. This work is part of a collaboration between Caltech and Northrop Grumman. C.D. acknowledges support from the Army Research Office (Grant No. 54272-EG, Dr. Bruce LaMattina) and the National Science Foundation (Grant No. 844540 CAREER).Attached Files
Published - Spadoni2011p13763Appl_Phys_Lett.pdf
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Additional details
- Eprint ID
- 23567
- Resolver ID
- CaltechAUTHORS:20110506-093926555
- Army Research Office (ARO)
- 54272-EG
- NSF
- CMMI-844540
- Created
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2011-05-09Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field