Thermal tuning on band gaps of 2D phononic crystals considering adhesive layers

Zhou, Xiaoliang; Chen, Jialin; Li, Yuhang; Sun, Yuxin; Xing, Yufeng

doi:10.1088/1361-6463/aaa650

Cited by 20 publications

(4 citation statements)

References 49 publications

(46 reference statements)

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“…From these data, we found that when the temperature changed from 20 °C to 80 °C, the young's modulus of PBT could experience a change of three orders of magnitude. However, the PBT maintained an elastic solid state even at a significant reduction in Young's modulus during the varied temperature [27]. The Poisson ratio (0.3) and mass density (1180 kg/m 3 ) of PBT were independent of the temperature.…”

Section: Numerical Resultsmentioning

confidence: 95%

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Study on Tunable Band Gap of Flexural Vibration in a Phononic Crystals Beam with PBT

Zhao

Yuan

et al. 2021

Crystals

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Low-frequency flexural vibration plays a significant role in beam vibration control. To efficiently attenuate the propagation of flexural vibration at a low-frequency range, this paper proposes a new type of a phononic crystals beam with an adjustable band gap. The governing equations of flexural vibration in a periodic beam are established based on the Euler theory and Timoshenko theory. The band structures are calculated by the plane wave expansion method, the attenuation properties and transmission response curves with a finite periodic beam are calculated by the spectral element method and finite element method. The effects of the elastic foundation and axial stress on band gaps are discussed in detail, and the regulation of the temperature field on the band gap is emphatically studied. The theoretical and numerical results show that the elastic foundation and axial stress have significant influence on the band gap, and the location and width of the band gaps can be adjusted effectively when the Young’s modulus of PBT is changed by a varying temperature. The results are very useful for understanding and optimizing the design for composite vibration isolation beams.

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Section: Numerical Resultsmentioning

confidence: 95%

“…The introduction of polybutylene terephthalate (PBT) into periodic structures makes it possible to regulate the band structure [26,27]. As a smart composite material, PBT is a kind of composite material with a unique temperature dependence.…”

Section: Introductionmentioning

confidence: 99%

Study on Tunable Band Gap of Flexural Vibration in a Phononic Crystals Beam with PBT

Zhao

Yuan

et al. 2021

Crystals

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“…These properties of spin wave would be helping for designing specific magnetic crystal structures for controlling spin wave. The artificial crystal structures have been attracted tremendous research efforts; the well studied being optical photonic crystals and acoustic phononic crystals [138][139][140][141][142][143][144][145][146][147][148][149][150][151][152]. The third category of artificial magnetic crystal structures, so-called magnonic crystals, are the magnetic analog of photonic crystals and phononic crystals and are useful for manipulating of spin wave.…”

Section: Impurity Dependencementioning

confidence: 99%

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

et al. 2019

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Magnonics, an emerging research field, aims to control and manipulate spin waves in magnetic materials and structures. However, the current understanding of spin waves remains quite limited. This review attempts to provide an overview of the anomalous behaviors of spin waves in various types of magnetic materials observed thus far by inelastic light scattering experiments. The anomalously large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed. In addition, the mechanisms of these anomalous behaviors of spin waves are proposed. spectroscopy is applied for studying vibrational properties of materials. However, due to the anomalous behaviors of spin wave scattering comparing with vibrational scattering, Raman spectroscopy study of spin wave is difficult and limited. In this paper, we present a review of anomalous behaviors of spin waves observed by inelastic light scattering experiments, especially by Raman spectroscopy. The large asymmetry of anti-Stokes to Stokes intensity ratio, broad linewidth, strong resonance effect, unique polarization selection, and abnormal impurity dependence of spin waves are discussed, and a proposed model for the mechanisms of spin flip, spin relaxing, and spin wave scattering is presented for understanding these anomalous behaviors of spin waves. In addition, two magnonic crystal structures are proposed for manipulating spin waves through analyses of the abnormal impurity dependence of spin waves. The review of the anomalous behaviors of spin waves and the proposed models provide the directions for easier experimental study of spin waves by inelastic light scattering, which will be useful for raising the research efforts for investigating spin waves. This is important for the emerging research of magnonics, which has received extensive interests in the modern magnetism research community.

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“…This unique ability endows PCs with a bright prospect to be applied in the area of noise suppression [1], filter [2,3], shock insulation [4,5], acoustic transducers [6], and so on. For promoting engineering applications of forbidden band gaps, many effective active adjusting and manipulating methods based on altering mechanical properties, sizes of crystal lattice, and topological structures have attracted a great deal of attention [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Band gap manipulation of viscoelastic functionally graded phononic crystal

Bian

Yang

Zhou

et al. 2020

Nanotechnology Reviews

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AbstractIn this study, band gaps of SH-waves (horizontally polarized shear waves) propagating in a thermal-sensitive viscoelastic matrix are investigated. Metallic films acting as heat sources are periodically embedded into the matrix, which establishes a periodically inhomogeneous thermal field. The homogenous matrix is therefore transformed into functionally gradient phononic crystals (PCs). A three-parameter solid model is employed to describe the viscoelasticity of the present matrix. By virtue of a transfer matrix method incorporated within a laminated model, the dispersion equation of SH-waves is finally obtained, from which the band gaps are determined. The transmission spectra of a finite-periodic PC are also solved to validate the band gaps. In numerical examples, the influences of incident angles of SH-waves and viscoelasticity of matrix on band gaps are discussed first. Then the research focuses on the means to tune the band gaps by manipulating the inputted powers of heat sources. Numerical examples demonstrate that such a strategy is effective and convenient in tuning the positions and widths of band gaps. A viscous parameter, i.e., the ratio of initial-state to final-state storage moduli, significantly affects the band locations and bandwidths, while the locations of low-order band gaps hardly move with the incident angle of SH-waves. Band gaps of several orders are expected to locate in lower-frequency domain, and the total bandwidth becomes larger as the inputted heat flux increases. This paper lays theoretical foundation to manufacture viscoelastic functionally graded PCs which can be used in frequency-selective devices.

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Thermal tuning on band gaps of 2D phononic crystals considering adhesive layers

Cited by 20 publications

References 49 publications

Study on Tunable Band Gap of Flexural Vibration in a Phononic Crystals Beam with PBT

Study on Tunable Band Gap of Flexural Vibration in a Phononic Crystals Beam with PBT

Anomalous Behaviors of Spin Waves Studied by Inelastic Light Scattering

Band gap manipulation of viscoelastic functionally graded phononic crystal

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