Tuning the locally resonant phononic band structures of two-dimensional periodic electroactive composites

Zhou, Xiaoling; Chen, Chang

doi:10.1016/j.physb.2013.08.042

Cited by 45 publications

(25 citation statements)

References 44 publications

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“…Subsequently, the low frequency band structures of twodimensional (2D) arc-shaped phononic crystals were studied by utilizing the transfer-matrix method [19]. Zhou and Chen introduced electrorheological (ER) fluids in concentric rings (considered as a soft layer in the system) and proved that the dual-oscillator structure has more band gaps than the single-oscillator structure [20]. Basically, the concentric ring structure is a typical multioscillator system, the acoustic properties of which are enhanced by larger quantities of oscillators.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Chen

Meng

Jiang

et al. 2018

Shock and Vibration

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The acoustic characteristics of 2D single-oscillator, dual-oscillator, and triple-oscillator acoustic metamaterials were investigated based on concentric ring structures using the finite element method. For the single-oscillator, dual-oscillator, and triple-oscillator models investigated here, the dipolar resonances of the scatterer always induce negative effective mass density, preventing waves from propagating in the structure, thus forming the band gap. As the number of oscillators increases, relative movements between the oscillators generate coupling effect; this increases the number of dipolar resonance modes, causes negative effective mass density in more frequency ranges, and increases the number of band gaps. It can be seen that the number of oscillators in the cell is closely related to the number of band gaps due to the coupling effect, when the filling rate is of a certain value.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Chen

Meng

Jiang

et al. 2018

Shock and Vibration

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“…More specifically, modifying the contrast in material parameters of a crystal, or changing the physical arrangement of components, manifests in the transmission spectrum and band structure to show the effects on transient sound. Active sonic structures with applied static electric fields, [14][15][16] magnetically, [17][18][19] mechanically 20,21 and recently with infrared radiation 22 have been reported. Most of these active sonic structures are in physical contact with the actuating source.…”

Section: Introductionmentioning

confidence: 99%

Radio-frequency actuated polymer-based phononic meta-materials for control of ultrasonic waves

Walker

Wang²,

Neogi

2017

NPG Asia Mater

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Radio-frequency (RF) control of an ultrasonic phononic crystal was achieved by encapsulating it in a composite of high k-10% KF-doped BaTiO 3 dielectric nanoparticles with poly(N-isopropylacrylamide) (PNIPAm)-based hydrogel. The combination of the nanoparticles and hydrogel produced a composite with elastic properties susceptible to RF actuation. The novel acoustic meta-material enables the regulation of sound waves by electromagnetic waves, which is not possible in a conventional medium as elasto-mechanical waves, and electromagnetic waves do not directly couple. Compared with light waves, radio waves can penetrate deeper into bulk structures and enable the control of propagation of ultrasonic waves through a macroscale phononic crystal. An RF antenna emitting at 318.6 and 422.5 kHz was used to modulate the device in water and ambient air, respectively. An increased transparency of the ultrasonic wave in the material was observed due to an increase in the bandwidth of the modulated device exceeding 8 kHz with a 30-fold increase in the signal modulation at select frequencies. The radio waves induced changes in the transmission and demonstrated the control of ultrasound with applied RF. The synthetic acoustic properties in the resultant meta-material device were actively manipulated through the interaction of electromagnetic waves with the material.

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“…In elastic wave control applications, MR elastomers were integrated into a multilayer, one-dimensional phononic crystal to actively tune wave band gaps [35]. Due to the similarity of ER and MR elastomers, several vibration and wave control applications have also been found with ER elastomers [36][37][38]. For instance, a tunable band structure of locally resonant phononic crystals was investigated by applying various electric fields to ER elastomers embedded in an elastic matrix [38].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the similarity of ER and MR elastomers, several vibration and wave control applications have also been found with ER elastomers [36][37][38]. For instance, a tunable band structure of locally resonant phononic crystals was investigated by applying various electric fields to ER elastomers embedded in an elastic matrix [38]. MR/ER elastomers would be another kind of attractive material in active EMM applications.…”

Section: Introductionmentioning

confidence: 99%

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Active elastic metamaterials for subwavelength wave propagation control

Chen

Huang

2015

Acta Mech Sin

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Recent research activities in elastic metamaterials demonstrate a significant potential for subwavelength wave propagation control owing to their interior locally resonant mechanism. The growing technological developments in electro/magnetomechanical couplings of smart materials have introduced a controlling degree of freedom for passive elastic metamaterials. Active elastic metamaterials could allow for a fine control of material physical behavior and thereby induce new functional properties that cannot be produced by passive approaches. In this paper, two types of active elastic metamaterials with shunted piezoelectric materials and electrorheological elastomers are proposed. Theoretical analyses and numerical validations of the active elastic metamaterials with detailed microstructures are presented for designing adaptive applications in band gap structures and extraordinary waveguides. The active elastic metamaterial could provide a new design methodology for adaptive wave filters, high signal-to-noise sensors, and structural health monitoring applications.

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Tuning the locally resonant phononic band structures of two-dimensional periodic electroactive composites

Cited by 45 publications

References 44 publications

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Investigation on the Band Gap and Negative Properties of Concentric Ring Acoustic Metamaterial

Radio-frequency actuated polymer-based phononic meta-materials for control of ultrasonic waves

Active elastic metamaterials for subwavelength wave propagation control

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