Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published April 18, 2011 | Published
Journal Article Open

Nonlinear phononic crystals based on chains of disks alternating with toroidal structures


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


Files (1.5 MB)
Name Size Download all
1.5 MB Preview Download

Additional details

August 19, 2023
October 23, 2023