DISPERSION RELATIONS FOR SH-WAVE PROPAGATION IN NANOSCALE PERIODIC PIEZOELECTRIC COMPOSITE LAYERED STRUCTURES
The influence of the small-scale effects on propagation behavior of horizontally polarized shear waves (SH-waves) in a nanoscale periodic piezoelectric-polymeric layered structure which are composed of piezoelectric thin films bonded perfectly with polymeric thin films alternately is investigated.The research using the transfer matrix method based on the nonlocal piezoelectricity continuum theory.The analytical expressions of the phase velocity equations of SH-waves propagation in the periodic layered piezoelectric structure with size effect are obtained for the case of wave propagation in the direction normal to the interface.The nonlocal effect has an obviously effect on the high frequency waves,but the effect on the lower frequency is not obvious,and the first band gap width can be decreased slightly when taking account of the nonlocal effect,and near the cut-off frequency,the bands are dense and flat,which imply that a strong wave localization phenomenon occurs.Furthermore,a cut-off frequency is found,beyond which the elastic waves cannot propagate through the periodic structure,and the size effect influence on the cut-off frequency and the wave propagation behavior are discussed.
Piezoelectric composite layered structures Nanoscale Size effect Phase velocity equation Filter effect
Xuan WANG Feng JIN
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace,Xian Jiaotong University, Xian, 710049, P. R. China
国际会议
The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)
西安
英文
438-442
2016-10-21（万方平台首次上网日期，不代表论文的发表时间）