title: Propagation of Love waves with surface effects in an electrically-shorted piezoelectric nanofilm on a half-space elastic substrate.
abstract: The propagation of Love waves in the structure consisting of a nanosized piezoelectric film and a semi-infinite elastic substrate is investigated in the present paper with the consideration of surface effects. In our analysis, surface effects are taken into account in terms of the surface elasticity theory and the electrically-shorted conditions are adopted on the free surface of the piezoelectric film and the interface between the film and the substrate. This work focuses on the new features in the dispersion relations of different modes due to surface effects. It is found that with the existence of surface effects, the frequency dispersion of Love waves shows the distinct dependence on the thickness and the surface constants when the film thickness reduces to nanometers. In general, phase velocities of all dispersion modes increase with the decrease of the film thickness and the increase of the surface constants. However, surface effects play different functions in the frequency dispersions of different modes, especially for the first mode dispersion. Moreover, different forms of Love waves are observed in the first mode dispersion, depending on the presence of the surface effects on the surface and the interface.
authors.affiliation: School of Manufacturing Science and Engineering, Southwest University of Science and Technology, PR China.
authors.forename: Sijia
authors.initials: S
authors.lastname: Zhang
authors.affiliation: School of Manufacturing Science and Engineering, Southwest University of Science and Technology, PR China. Electronic address: gubin@swust.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Gu
authors.affiliation: School of Civil Engineering and Architecture, Hainan University, PR China.
authors.forename: Hongbin
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Institute of Biomechanics and Medical Engineering, Department of Engineering Mechanics, Tsinghua University, PR China.
authors.forename: Xi-Qiao
authors.initials: XQ
authors.lastname: Feng
authors.affiliation: School of Manufacturing Science and Engineering, Southwest University of Science and Technology, PR China.
authors.forename: Rongying
authors.initials: R
authors.lastname: Pan
authors.affiliation: School of Manufacturing Science and Engineering, Southwest University of Science and Technology, PR China.
authors.lastname: Alamusi
authors.affiliation: College of Aerospace Engineering, Chongqing University, Chongqing, PR China.
authors.forename: Ning
authors.initials: N
authors.lastname: Hu
mesh_terms: D004548:Elasticity; D019220:High-Energy Shock Waves; D008962:Models, Theoretical; D049329:Nanostructures; D013499:Surface Properties; D014465:Ultrasonics
keywords: Electrically-shorted; Frequency dispersion; Love wave; Piezoelectric nanofilm; Surface effects