Voltage-controlled complete stopbands in two-dimensional soft dielectrics

被引：43

作者：

Getz, Roey ^{[1
]}

Kochmann, Dennis M. ^{[2
]}

Shmuel, Gal ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel

[2] CALTECH, Grad Aerosp Labs, Pasadena, CA 91125 USA

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2017年 / 113卷

关键词：

Dielectric elastomer; Wave propagation; Band gap; Composite; Phononic crystal; Plane wave expansion; Nonlinear elasticity; ACOUSTIC BAND-STRUCTURE; UNIVERSAL RELATIONS; PERIODIC STRUCTURES; PHONONIC CRYSTALS; WAVE-PROPAGATION; GAPS; DEFORMATION; INVARIANTS; ELASTOMERS; STABILITY;

D O I：

10.1016/j.ijsolstr.2016.10.002

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Dielectric elastomers deform and stiffen when subjected to voltage. This work demonstrates how fiber composites made of incompressible dielectric elastomers exhibit complete band gaps frequency ranges in which elastic wave propagation is prohibited, irrespective of its polarization and direction. To this end, we first analytically determine the quasi-static response of a wide class of composites to an electric field along the fibers. We then formulate and calculate incremental motions of general polarization propagating in the deformed composite, using a plane wave expansion approach. We numerically explore the dependency of the motion on the composite properties and electric field. We show how complete band gaps are tuned by adjusting the electric field, owing to resultant geometrical and physical changes. These results suggest that soft dielectrics can serve as tunable waveguides and filters. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：24 / 36

页数：13

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