Investigation of flexural wave band gaps in a locally resonant metamaterial with plate-like resonators

Jaesoon Jung, Seongyeol Goo, Semyung Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper presents an investigation of flexural wave band gaps in locally resonant metamaterials (LRMs). An LRM is a periodic structure consisting of repeated unit cells containing a local resonator. Due to the local resonance occurring in the unit cell, the LRM induces a band gap (a frequency band in which no waves propagate). Discrete-like or beam-like resonators have generally been used to realise LRMs in previous research. By extending the beam-like resonator configuration, this paper studies LRMs with a plate-like resonator to exploit its advantages with respect to large design freedom. In order to understand flexural wave band gaps in an LRM with plate-like resonators, parametric studies are conducted with the development of a finite element model. Further, the influences of the plate-like resonator design parameters on flexural wave band gaps are investigated. Based on the parametric studies, the rules governing band gap properties are determined. Finally, tailoring flexural wave band gaps by adjusting the parameters is discussed.

Original languageEnglish
Article number102492
JournalWave Motion
Volume93
ISSN0165-2125
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • Band gap
  • Bloch theory
  • Finite element method
  • Flexural wave
  • Locally resonant metamaterial
  • Plate-like resonator

Cite this