Effect of negative permeability on elastic wave propagation in magnetoelastic multilayered composites  

作　　者：W. Wang Y.Q. Guo W.Q. Chen 

机构地区：[1]Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, and School of Civil Engineering and Mechanics,Lanzhou University, Lanzhou 730000, China [2]Department of Engineering Mechanics, Yuquan Campus, Zhejiang University, Hangzhou 310027, China [3]Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China

出　　处：《Theoretical & Applied Mechanics Letters》2017年第3期126-133,共8页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11372119);partly by the Fundamental Research Funds for the Central Universities(2016XZZX001-05)

摘　　要：With the advent of left-handed magnetic materials, it is desirable to develop high-performance wave devices based on their novel properties of wave propagation. This letter reports the special properties of elastic wave propagation in magnetoelastic multilayered composites with negative permeability as compared to those in counterpart structures with positive permeability. These novel properties of elastic waves are discerned from the diversified dispersion curves, which represent the propagation and attenuation characteristics of elastic waves. To compute these dispersion curves, the method of reverberation-ray matrix is extended for the analysis of elastic waves in magnetoelastic multilayered composites. Although only the results of a single piezomagnetic and a binary magnetoelastic layers with mechanically free and magnetically short surfaces as well as perfect interface are illustrated in the numerical examples, the analysis is applicable to magnetoelastic multilayered structures with other kinds of boundaries/interfaces.With the advent of left-handed magnetic materials, it is desirable to develop high-performance wave devices based on their novel properties of wave propagation. This letter reports the special properties of elastic wave propagation in magnetoelastic multilayered composites with negative permeability as compared to those in counterpart structures with positive permeability. These novel properties of elastic waves are discerned from the diversified dispersion curves, which represent the propagation and attenuation characteristics of elastic waves. To compute these dispersion curves, the method of reverberation-ray matrix is extended for the analysis of elastic waves in magnetoelastic multilayered composites. Although only the results of a single piezomagnetic and a binary magnetoelastic layers with mechanically free and magnetically short surfaces as well as perfect interface are illustrated in the numerical examples, the analysis is applicable to magnetoelastic multilayered structures with other kinds of boundaries/interfaces.

关 键 词：Magnetoelastic multilayered composites Elastic wave propagation Method of reverberation-ray matrix Negative permeability Wave mode conversion 

分 类 号：O482.54[一般工业技术—材料科学与工程]