Tunability of Band Gaps in Two-Dimensional Phononic Crystals with Magnetorheological and Electrorheological Composites
Tunability of Band Gaps in Two-Dimensional Phononic Crystals with Magnetorheological and Electrorheological Composites
复制标题
DOI：
10.1007/s10338-020-00189-6
复制
发表时间：
2020-09
影响因子：
2.2
通讯作者：
Gang Zhang;Yuanwen Gao
中科院分区：
文献类型：
--
作者：
Gang Zhang;Yuanwen Gao
研究了嵌入在磁流变和电流变弹性体中的弹性矩阵构成的声子晶体的弹性波传播特性。利用有限元法和超级单体技术计算了这些材料的可调带隙和透射光谱。给出了带隙特性随电场/磁场变化的变化规律。数值计算结果表明，电场和磁场可以有效地调节带隙。带隙的起、停频率受电场的影响明显，带隙宽度受磁场的调节更为显著。电场和磁场的联合作用可获得最宽和最高的带隙。此外，可以通过在PnC上钻孔将带隙移动到低频区域，这也可以打开或关闭新的带隙。这些结果表明了智能pnc弹性波特性的多物理场调控和设计优化的可能性。
The elastic wave propagation properties of phononic crystals (PnCs) composed of an elastic matrix embedded in magnetorheological and electrorheological elastomers are studied in this paper. The tunable band gaps and transmission spectra of these materials are calculated using the finite element method and supercell technology. The variations in the band gap characteristics with changes in the electric/magnetic fields are given. The numerical results show that the electric and magnetic fields can be used in combination to adjust the band gaps effectively. The start and stop frequencies of the band gap are obviously affected by the electric field, and the band gap width is regulated more significantly by the magnetic field. The widest and highest band gap can be obtained by combined application of the electric and magnetic fields. In addition, the band gaps can be moved to the low-frequency region by drilling holes in the PnC, which can also open or close new band gaps. These results indicate the possibility of multi-physical field regulation and design optimization of the elastic wave properties of intelligent PnCs.