Applied Mathematics and Mechanics (English Edition) ›› 2018, Vol. 39 ›› Issue (2): 207-218.doi: https://doi.org/10.1007/s10483-018-2295-6

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Propagation behavior of SH waves in a piezomagnetic substrate with an orthorhombic piezoelectric layer

Yanping KONG1, Ruomeng TIAN2, Jie XU3, Jinxi LIU1   

  1. 1. Department of Engineering Mechanics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
    2. Department of Civil Engineering, Shijiazhuang Tiedao University Sifang College, Shijiazhuang 051132, China;
    3. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian 116024, Liaoning Province, China
  • Received:2017-04-01 Revised:2017-08-04 Online:2018-02-01 Published:2018-02-01
  • Contact: Jinxi LIU E-mail:liujx02@hotmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No.11272222) and the Key Project of Hebei Provincial Education Department of China (No. ZD2017072)

Abstract: The dispersion behavior of the shear horizontal (SH) waves in the coupled structure consisting of a piezomagnetic substrate and an orthorhombic piezoelectric layer is investigated with different cut orientations. The surface of the piezoelectric layer is mechanically free, electrically shorted, or open, while the surface of the piezomagnetic substrate is mechanically free, magnetically open, or shorted. The dispersion relations are derived for four electromagnetic boundary conditions. The dispersion characteristics are graphically illustrated for the layered structure with the PMN-PT layer perfectly bonded on the CoFe2O4 substrate. The effects of the PMN-PT cut orientations, the electromagnetic boundary conditions, and the thickness ratio of the layer to the substrate on the dispersion behavior are analyzed and discussed in detail. The results show that, (i) the effect of the cut orientation on the dispersion curves is very obvious, (ii) the electrical boundary conditions of the PMN-PT layer dominate the propagation feature of the SH waves, and (iii) the thickness ratio has a significant effect on the phase velocity when the wave number is small. The results of the present paper can provide valuable theoretical references to the applications of piezoelectric/piezomagnectic structure in acoustic wave devices.

Key words: tensor equation, hi-spatial tensor, square tensor-product, orthorhombic piezoelectric material, dispersion relation, PMN-PT single crystal, shear horizontal (SH) wave, piezomagnetic material

2010 MSC Number: 

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