Characterization of ceramic phononic crystals prepared with additive manufacturing: Ultrasonic technique and finite element analysis

I. Chieh Lee, N. Jeyaprakash*, Che Hua Yang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

4 Scopus citations

Abstract

Phononic crystals (PCs) are composed of two or more elastic materials arranged periodically. One of the important characteristics of PCs is the band gap. Band gap is the frequency range within which elastic waves are not allowed to transmit. With the band gap, applications of PCs include filters for body waves and surface acoustic waves. In the recent years, the additive manufacturing technique has been widely employed to fabricate objects with complicated geometries like PCs. In this study, samples of ceramic PCs were fabricated with the additive manufacturing technique. In addition to that Finite Element Analysis (FEA) was employed to predict the band gaps of PCs fabricated with the traditional and the additive manufacturing technique. Experimental measurements with pulsed ultrasound technique together with fast Fourier Transform (FFT) were employed to measure the band gaps. In general, measurement results agree well with the FEA results. The outcomes of this study suggest a new PCs fabrication method based on the additive manufacturing technique.

Original languageEnglish
Pages (from-to)27550-27560
Number of pages11
JournalCeramics International
Volume46
Issue number17
DOIs
StatePublished - 01 12 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd and Techna Group S.r.l.

Keywords

  • Additive manufacturing
  • Band gap
  • Ceramics
  • Finite element analysis
  • Nondestructive technique
  • Phononic crystal

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