The tunable acoustic band gaps of two-dimensional phononic crystals with a dielectric elastomer cylindrical actuator

Wen Pei Yang, Lien-Wen Chen

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

By calculating the transmission coefficients by finite-element software, the study of the tunable acoustic band gap for two-dimensional (2D) phononic crystals composed of a square array of hollow cylinders in an air background is considered. The inclusions are a dielectric elastomer cylindrical actuator, which is made of a hollow cylinder sandwiched between two compliant electrodes. By applying a voltage between the compliant electrodes, the radial strain of the silicone-made actuator is investigated. The acoustic band gaps are changed due to the radial strain of the dielectric elastomer. The frequency range of the dielectric elastomer composite can be extended by increasing the applied voltage. A tunable acoustic band gap of the phononic crystal is realized via the unique character of dielectric elastomer. The calculations also demonstrate that there exists a local stop band within the pass band. With a local stop band gap, 2D phononic crystals may thus serve as an acoustic filter or switch.

Original languageEnglish
Article number015011
JournalSmart Materials and Structures
Volume17
Issue number1
DOIs
Publication statusPublished - 2008 Feb 1

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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