Dynamic response of a tunable phononic crystal under applied mechanical and magnetic loadings

被引：45

作者：

Bayat, Alireza ^{[1
]}

Gordaninejad, Faramarz ^{[1
]}

机构：

[1] Univ Nevada, Dept Mech Engn, Composite & Intelligent Mat Lab, Reno, NV 89557 USA

来源：

SMART MATERIALS AND STRUCTURES | 2015年 / 24卷 / 06期

关键词：

phononic crystal; directionality; soft magnetorheological elastomers; band-gaps; WAVE BAND-GAPS; DEFORMATION; BEHAVIOR;

D O I：

10.1088/0964-1726/24/6/065027

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The dynamic response of a tunable phononic crystal consisting of a porous hyperelastic magnetoelastic elastomer subjected to a macroscopic deformation and an external magnetic field is theoretically investigated. Finite deformations and magnetic induction influence phononic characteristics of the periodic structure through geometrical pattern transformation and material properties. A magnetoelastic energy function is proposed to develop constitutive laws considering large deformations and magnetic induction in the periodic structure. Analytical and finite element methods are utilized to compute the dispersion relation and band structure of the phononic crystal for different cases of deformation and magnetic loadings. It is demonstrated that magnetic induction not only controls the band diagram of the structure but also has a strong effect on preferential directions of wave propagation.

引用

页数：11

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