EFFECTS OF POISSONS RATIO ON THE BAND GAPS OF THREE-DIMENSIONAL SOLID/SOLID PHONONIC CRYSTALS
Phononic crystals (PCs) are a kind of acoustic composite materials which have periodic structures and exhibit elastic wave (EW) band gaps. Due to their unique properties the phononic crystals have potential applications in acoustic devices and noise control, etc. The effects of both positive and negative Poissons ratios on the phononic band gaps (PBGs) due to either Bragg scattering or locally resonance in three-dimensional (3D) solid/solid phononic crystals with a simple-cubic (SC) lattice are studied. The band structures are obtained by the finite difference time domain (FDTD) method combined with the fast Fourier transform- (FFT-) based postprocessing method. The numerical results show that Poissons ratio of the scatterer plays an important role in tuning the PBGs.
Phononic crystal Band gap Poissons ratio Finite Difference Time Domain method
Tian-Xue Ma Xiao-Xing Su Yan-Feng Wang Yue-Sheng Wang
Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044 School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044
国际会议
深圳
英文
411-414
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）