Accession Number : AD1010149

Title :   Highly Nonlinear Wave Propagation in Elastic Woodpile Periodic Structures

Descriptive Note : Journal Article

Corporate Author : University of Washington Seattle United States

Personal Author(s) : Kim,E ; Li,F ; Chong,C ; Theocharis,G ; Yang,J ; Kevrekidis,P G

Full Text :

Report Date : 03 Aug 2016

Pagination or Media Count : 5

Abstract : In the present work, we experimentally implement, numerically compute with and theoretically analyze a configuration in the form of a single column woodpile periodic structure. Our main finding is that a Hertzian, locally-resonant, woodpile lattice offers a test bed for the formation of genuinely traveling waves composed of a strongly-localized solitary wave on top of a small amplitude oscillatory tail. This type of wave, called a nanopteron, is not only motivated theoretically and numerically, but are also visualized experimentally by means of a laser Doppler vibrometer. This system can also be useful for manipulating stress waves at will, for example, to achieve strong attenuation and modulation of high-amplitude impacts without relying on damping in the system.

Descriptors :   Wave propagation , traveling waves , Nonlinear systems , Mechanical waves , waveforms , frequency , couplings , crystals , photonic crystals

Distribution Statement : APPROVED FOR PUBLIC RELEASE