caa a22 4500 445812591 CHVBK 20180317145216.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s00419-011-0515-2 doi (NATIONALLICENCE)springer-10.1007/s00419-011-0515-2 Effects of covering layer thickness on Love waves in functionally graded piezoelectric substrates [Elektronische Daten] [Zheng-Hua Qian, Feng Jin, Sohichi Hirose] An analytical approach is used to investigate the effects of covering layer thickness on the propagation behavior of Love waves in functionally graded piezoelectric materials (FGPMs) covered with a dielectric layer. The piezoelectric substrate is polarized in the direction perpendicular to the wave propagation plane, and its material parameters change continuously along the thickness direction. The dispersion equations for the existence of Love waves with respect to phase velocity are obtained for electrically open and shorted cases, respectively. A detailed investigation of the effects of the covering dielectric layer thickness on dispersion curve, phase velocity, group velocity, and electromechanical coupling factor is carried out. Numerical results show that for a given FGPM, the covering dielectric layer thickness affects significantly the fundamental mode of Love waves but has only negligible effects on the high-order modes. The changes in phase velocity, group velocity, and electromechanical coupling factor due to the change of gradient coefficient of FGPMs could be approached approximately by changing the thickness of the covering dielectric layer, which imply a potential factor for designing new-type surface wave devices with FGPMs. Springer-Verlag, 2011 Love waves nationallicence Functionally graded piezoelectric materials (FGPMs) nationallicence Covering layer thickness nationallicence Dispersion relation nationallicence Electromechanical coupling factor nationallicence Qian Zheng-Hua Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, 152-8550, Tokyo, Japan aut Jin Feng MOE Key Laboratory for Strength and Vibration, Xi'an Jiaotong University, 710049, Xi'an, People's Republic of China aut Hirose Sohichi Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, 152-8550, Tokyo, Japan aut Archive of Applied Mechanics Springer-Verlag 81/11(2011-11-01), 1743-1755 0939-1533 81:11<1743 2011 81 419 https://doi.org/10.1007/s00419-011-0515-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00419-011-0515-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Qian Zheng-Hua Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, 152-8550, Tokyo, Japan aut NATIONALLICENCE 700 1- Jin Feng MOE Key Laboratory for Strength and Vibration, Xi'an Jiaotong University, 710049, Xi'an, People's Republic of China aut NATIONALLICENCE 700 1- Hirose Sohichi Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, 152-8550, Tokyo, Japan aut NATIONALLICENCE 773 0- Archive of Applied Mechanics Springer-Verlag 81/11(2011-11-01), 1743-1755 0939-1533 81:11<1743 2011 81 419 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer