THE INFLUENCE OF FUNCTIONALLY GRADED LAYER ON THE BAND STRUCTURES OF ONE-DIMENSIONAL PHONONIC CRYSTALS
In this paper,the propagation of surface acoustic waves in a periodic structure which consists of periodic domain inversion piezoelectric substrate covered by a functionally graded layer is studied.We calculated the band structures using the finite element method.The effects of the gradient variation of material constants on the band structures are discussed in detail.Numerical analysis shows that the band gap shifts to lower frequency and the bandwidth decreases with increase of the positive gradient factor β,whereas the band gap shifts to higher frequency and the bandwidth increase with increase of the negative gradient factor β.Besides,the thickness of the layer also has a significant effect on the first band gap.
Piezoelectric phononic crystal Love wave Functional graded material FEM
Guang-ying Yang Ming-hua Zhang Jia Lou Meng-kai Lu Ji Wang Jian-ke Du
College of Civil Engineering and Architecture, Jiaxing University, Jiaxing, P.R.China, 314001;School School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, P.R.China, 315211
国际会议
石家庄
英文
327-330
2019-11-01（万方平台首次上网日期，不代表论文的发表时间）