title: Temperature effects on the band gaps of Lamb waves in a one-dimensional phononic-crystal plate (L).
abstract: This study investigates the temperature-tuned band gaps of Lamb waves in a one-dimensional phononic-crystal plate, which is formed by alternating strips of ferroelectric ceramic Ba(0.7)Sr(0.3)TiO(3) and epoxy. The sensitive and continuous temperature-tunability of Lamb wave band gaps is demonstrated using the analyses of the band structures and the transmission spectra. The width and position of Lamb wave band gaps shift prominently with variation of temperature in the range of 26 °C-50 °C. For example, the width of the second band gap increases from 0.066 to 0.111 MHz as the temperature is increased from 26 °C to 50 °C. The strong shift promises that the structure could be suitable for temperature-tuned multi-frequency Lamb wave filters.
authors.affiliation: Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Cheng
authors.forename: X J
authors.initials: XJ
authors.lastname: Liu
authors.forename: D J
authors.initials: DJ
authors.lastname: Wu
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D017609:Barium Compounds; D002516:Ceramics; D003460:Crystallization; D055119:Elastic Modulus; D004852:Epoxy Compounds; D004867:Equipment Design; D020342:Finite Element Analysis; D008962:Models, Theoretical; D009038:Motion; D013016:Sound; D013324:Strontium; D013696:Temperature; D013997:Time Factors; D014025:Titanium
chemical_list: D017609:Barium Compounds; D004852:Epoxy Compounds; C024547:barium titanate(IV); D014025:Titanium; D013324:Strontium