Double defects-induced elastic wave coupling and energy localization in a phononic crystal.

ABSTRACT: This study aims to investigate elastic wave localization that leverages defect band splitting in a phononic crystal with double defects through in-depth analysis of comparison of numerical and experimental results. When more than one defect is created inside a phononic crystal, these defects can interact with each other, resulting in a distinctive physical phenomenon from a single defect case: defect band splitting. For a phononic crystal consisting of circular-hole type unit cells in a thin aluminum plate, under A₀ (the lowest antisymmetric) Lamb waves, both numerical simulations and experiments successfully confirm the defect band splitting phenomenon via frequency response functions for the out-of-plane displacement calculated/measured at the double defects within a finite di

SUBMITTER: Jo SH 

PROVIDER: S-EPMC8446117 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature