Acoustic Poisson-like effect in periodic structures

Alexey S Titovich; Andrew N Norris

doi:10.1121/1.4950709

Acoustic Poisson-like effect in periodic structures

J Acoust Soc Am. 2016 Jun;139(6):3353. doi: 10.1121/1.4950709.

Authors

Alexey S Titovich¹, Andrew N Norris¹

Affiliation

¹ Mechanical and Aerospace Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.

PMID: 27369161
DOI: 10.1121/1.4950709

Abstract

Redirection of acoustic energy by 90° is shown to be possible in an otherwise acoustically transparent sonic crystal. An unresponsive "deaf" antisymmetric mode is excited by matching Bragg scattering with a quadrupole scatterer resonance. The dynamic effect causes normal unidirectional wave motion to strongly couple to perpendicular motion, analogous to the quasi-static Poisson effect in solids. The Poisson-like effect is demonstrated using the first flexural resonance in cylindrical shells of elastic solids. Simulations for a finite array of acrylic shells that are impedance and index matched to water show dramatic acoustic energy redirection in an otherwise acoustically transparent medium.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.