Specifications

Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
8.
Accession number: 20134016796238
Title: Investigation of trapped thickness-twist waves induced by functionally graded
piezoelectric material in an inhomogeneous plate
Authors: Li, Peng1 ; Jin, Feng1 ; Cao, Xiao-Shan2/李鹏;金峰;曹小杉
Author affiliation: 1 State Key Laboratory for Strength and Vibration of Mechanical Structures,
School of Aerospace, Xi'An Jiaotong University, Xi'an 710049, China
2 Department of Engineering Mechanics, School of Civil Engineering and Architecture, Xi'an
University of Technology, Xi'an 710048, China
Source title: Smart Materials and Structures
Abbreviated source title: Smart Mater Struct
Volume: 22
Issue: 9
Issue date: September 2013
Publication year: 2013
Article number: 095021
Language: English
ISSN: 09641726
E-ISSN: 1361665X
CODEN: SMSTER
Document type: Journal article (JA)
Publisher: Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United
Kingdom
Abstract: The effect of functional graded piezoelectric materials on the propagation of
thickness-twist waves is investigated through equations of the linear theory of piezoelectricity.
The elastic and piezoelectric coefficients, dielectric permittivity, and mass density are assumed to
change in a linear form but with different graded parameters along the wave propagation
direction. We employ the power-series technique to solve the governing differential equations
with variable coefficients attributed to the different graded parameters and prove the correction
and convergence of this method. As a special case, the functional graded middle layer resulting
from piezoelectric damage and material bonding is investigated. Piezoelectric damaged material
can facilitate energy trapping, which is impossible in perfect materials. The increase in the
damaged length and the reduction in the piezoelectric coefficient decrease the resonance
frequency but increase the number of modes. Higher modes of thickness-twist waves appear
periodically along the damaged length. Moreover, the displacement of the center of the
damaged portion is neither symmetric nor anti-symmetric, unlike the non-graded plate. The
conclusions are theoretically and practically significant for wave devices. © 2013 IOP Publishing
Ltd.
Number of references: 38
Main heading: Piezoelectricity
Controlled terms: Crystallography - Differential equations - Permittivity - Wave