Tunability of Band Gaps of Programmable Hard-Magnetic Soft Material Phononic Crystals
Tunability of Band Gaps of Programmable Hard-Magnetic Soft Material Phononic Crystals
复制标题
可编程硬磁软材料声子晶体带隙的可调性
DOI：
10.1007/s10338-022-00336-1
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发表时间：
2022-07-29
影响因子：
2.2
通讯作者：
Gao, Yuanwen
中科院分区：
文献类型：
--
作者：
Li, Bo;Yan, Wei;Gao, Yuanwen
本文研究了外加磁场作用下二维硬磁软材料声子晶体(HmSM-PnCs)的弹性波带隙特性。首先，通过实验测量得到了硬磁软磁材料的相关材料参数。然后建立了可编程HmSM-PNC的有限元模型，计算了其在外加磁场作用下的能带结构。给出了磁场、结构厚度、结构孔隙率、磁各向异性编码方式等因素对带隙的影响。结果表明，起止频率和带隙宽度可以通过改变磁场来调节。磁各向异性编码方式对带隙个数和带隙临界磁场有显著影响。此外，还讨论了几何尺寸对PNC结构的影响。随着结构厚度的增加，禁带的起止频率增加。
In this paper, the elastic wave band gap characteristics of two-dimensional hard-magnetic soft material phononic crystals (HmSM-PnCs) under the applied magnetic field are studied. Firstly, the relevant material parameters of hard-magnetic soft materials (HmSMs) are obtained by the experimental measurement. Then the finite element model of the programmable HmSM-PnCs is established to calculate its band structure under the applied magnetic field. The effects of some factors such as magnetic field, structure thickness, structure porosity, and magnetic anisotropy encoding mode on the band gap are given. The results show that the start and stop frequencies and band gap width can be tunable by changing the magnetic field. The magnetic anisotropy encoding mode has a remarkable effect on the number of band gaps and the critical magnetic field of band gaps. In addition, the effect of geometric size on PnC structure is also discussed. With the increase of the structure thickness, the start and stop frequencies of the band gap increase.