title: Investigation of complete bandgaps in a piezoelectric slab covered with periodically structured coatings.
abstract: The propagation of elastic waves in a piezoelectric slab covered with periodically structured coatings or the so-called stubbed phononic crystal slab is investigated. Four different models are selected and the effects of distribution forms and geometrical parameters of the structured coatings on complete bandgaps are discussed. The phononic crystal slab with symmetric coatings can generate wider complete bandgaps while that with asymmetric coatings is favorable for the generation of multi-bandgaps. The complete bandgaps, which are induced by locally resonant effects, change significantly as the geometry of the coatings changes. Moreover, the piezoelectric effects benefit the opening of the complete bandgaps.
authors.affiliation: Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, PR China.
authors.forename: Kui
authors.initials: K
authors.lastname: Zou
authors.affiliation: Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, PR China.
authors.forename: Tian-Xue
authors.initials: TX
authors.lastname: Ma
authors.affiliation: Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, PR China. Electronic address: yswang@bjtu.edu.cn.
authors.forename: Yue-Sheng
authors.initials: YS
authors.lastname: Wang
keywords: Bandgap; Elastic wave; Phononic crystal; Piezoelectric effect