Dispersive characteristics of sh surface waves in semi-infinite magneto-electro-elastic layered periodic structures

Author

Yu Pang ; Zhen-hua Sun ; Jin-xi Liu

Author_Institution

Dept. of Eng. Mech., Shijiazhuang Tie Dao Univ., Shijiazhuang, China

fYear

2012

fDate

23-25 Nov. 2012

Firstpage

419

Lastpage

422

Abstract

By the transfer matrix method, dispersive characteristics of the shear horizontal (SH) surface waves in semi-infinite piezoelectric(PE)/elastic(EL)/piezomagnetic(PM) and PM/EL/PE layered periodic structures are investigated. The free surface is parallel to the layer interfaces. Both PE and PM materials are transversely isotropic. The effects of different electric-magnetic boundary conditions at the free surface on the dispersion curves have been discussed. For comparison, band structures for the SH bulk waves in corresponding infinite periodic media are presented. Numerical results show that dispersion curves of the SH surface waves are inside the frequency gaps. The electric/magnetic conditions dominate the dispersive characteristics of the surface waves for the PE/EL/PM and PM/EL/PE structures, respectively. The frequency band structures for SH bulk waves are consistent for these two structures.

Keywords

elastic waves; interface structure; magnetoelastic effects; numerical analysis; periodic structures; piezoelectric materials; PE materials; PM materials; PM-EL-PE layered periodic structures; SH bulk waves; SH surface waves; dispersion curves; dispersive characteristics; electric-magnetic boundary conditions; free surface; frequency band structures; frequency gaps; layer interfaces; periodic media; piezoelectric materials; piezoelectric-elastic-piezomagnetic layered periodic structures; piezomagnetic materials; semiinfinite magneto-electro-elastic layered periodic structures; shear horizontal surface waves; transfer matrix method; Boundary conditions; Dispersion; Equations; Periodic structures; Polymers; Surface waves; Dispersion curves; Layered periodic structures; Magneto-electro-elastic; SH surface wave;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2012 Symposium on

Conference_Location

Shanghai

Print_ISBN

978-1-4673-4814-0

Type

conf

DOI

10.1109/SPAWDA.2012.6464123

Filename

6464123