scholarly journals Topologically protected edge states of elastic waves in phononic crystal plates

2020 ◽  
Vol 69 (15) ◽  
pp. 156201
Author(s):  
Zhou-Fu Zheng ◽  
Jian-Fei Yin ◽  
Ji-Hong Wen ◽  
Dian-Long Yu
Keyword(s):  
Elastic Waves ◽  
Phononic Crystal ◽  
Edge States

Designing a phononic crystal with large-size defect to enhance elastic wave energy localization and harvesting

2021 ◽  
Author(s):  
Xian’e Yang ◽  
Jiahui Zhong ◽  
Jiawei Xiang
Keyword(s):  
Energy Harvesting ◽  
Elastic Waves ◽  
Phononic Crystal ◽  
Defect Mode ◽  
Energy Localization ◽  
Remarkable Effect ◽  
Large Size ◽  
Piezoelectric Energy ◽  
Elastic Wave Energy ◽  
Multiple Cells

Abstract Phononic crystal (PnC) has been proved for its manipulation and amplification of elastic waves. Using this characteristic of PnC to assist energy harvesting has remarkable effect. Generally, defect occurs when unit cell in PnC is replaced by another cell with different geometric or material properties, the output electric power of piezoelectric energy harvesting (PEH) devices will be significantly enhanced. In this study, a cross hole-type PnC-assisted PEH device with a large-size defect is presented by replacing several adjacent multiple cells with other cells. It is found that multiple peak voltages can be created within BG and multimodal energy harvesting can be performed. Compared with the defect mode composed of a small-size defect, energy localization and amplification of the proposed PnC leads to substantially enhancement of harvesting power after tailoring geometric parameters of a PEH device. This work will be expected to design PnC-assisted PEH devices in a reasonable way.

Phononic Band Gaps in Al2O3/Epoxy Composite

2018 ◽  
Vol 912 ◽  
pp. 112-117 ◽  
Author(s):  
Edson Jansen Pedrosa Miranda Jr. ◽  
J.M.C. dos Santos
Keyword(s):  
Cross Section ◽  
Transverse Vibration ◽  
Elastic Waves ◽  
Epoxy Composite ◽  
Phononic Crystal ◽  
Band Gaps ◽  
Square Lattice ◽  
Plane Wave Expansion ◽  
Phononic Band Gaps ◽  
Angle Of Rotation

In this study, we have investigated the band structure of elastic waves propagating in a phononic crystal, consisting of an epoxy matrix reinforced by Al2O3 inclusions in a square and hexagonal lattices. We also studied the influence of the inclusion geometry cross section – circular, hollow circular, square and rotated square with a 45° angle of rotation with respect to the x, y axes. The plane wave expansion (PWE) method is used to solve the wave equation considering the wave propagation in the xy plane (longitudinal-transverse vibration, XY mode, and transverse vibration, Z mode). The complete band gaps between the XY and Z modes are observed to circular, square and rotated square cross section inclusion and the best performance is for rotated square cross section inclusion in a square lattice. We suggest that the Al2O3/epoxy composite is feasible for vibrations management.

Pseudospins and topological edge states for fundamental antisymmetric Lamb modes in snowflakelike phononic crystal slabs

2019 ◽  
Vol 146 (1) ◽  
pp. 729-735 ◽  
Author(s):  
Shao-yong Huo ◽  
Jiu-jiu Chen ◽  
Lu-yang Feng ◽  
Hong-bo Huang
Keyword(s):  
Phononic Crystal ◽  
Edge States

The Propagation of In-Plane Waves in Multilayered Elastic/Piezoelectric Composite Structures with Imperfect Interface

2013 ◽  
Vol 750-752 ◽  
pp. 95-98 ◽  
Author(s):  
Man Lan ◽  
Pei Jun Wei
Keyword(s):  
Dispersion Equation ◽  
Elastic Waves ◽  
Composite Structures ◽  
Mass Parameter ◽  
Phononic Crystal ◽  
Plane Waves ◽  
Stop Band ◽  
Imperfect Interface ◽  
Piezoelectric Composite ◽  
Pass Band

The dispersive characteristic of in-plane elastic waves propagating through laminated piezoelectric phononic crystal with imperfect interface is studied in this paper. First, the transfer matrix method (TMM) and the Bloch theorem are used to derive the dispersion equation. Next, the dispersion equation is solved numerically and the dispersive curves are shown in Brillouin zone. The pass band and the stop band of in-plane wave propagating normal to the laminated periodic structure with spring imperfect interface are investigated. The effects of the spring or mass parameter are discussed.

scholarly journals Propagation of Elastic Waves in a One-Dimensional High Aspect Ratio Nanoridge Phononic Crystal

2018 ◽  
Vol 8 (5) ◽  
pp. 805 ◽  
Author(s):  
Abdellatif Gueddida ◽  
Yan Pennec ◽  
El El Boudouti ◽  
George Fytas ◽  
Bahram Djafari Rouhani
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Elastic Waves ◽  
Phononic Crystal ◽  
One Dimensional ◽  
Propagation Of Elastic Waves

scholarly journals On-chip temporal focusing of elastic waves in a phononic crystal waveguide

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
M. Kurosu ◽  
D. Hatanaka ◽  
K. Onomitsu ◽  
H. Yamaguchi
Keyword(s):  
Elastic Waves ◽  
Phononic Crystal ◽  
Temporal Focusing ◽  
On Chip

Band Gaps of SH Wave in Piezoelectric Phononic Crystal

2011 ◽  
Vol 239-242 ◽  
pp. 1486-1489
Author(s):  
Man Lan ◽  
Pei Jun Wei
Keyword(s):  
Dispersion Equation ◽  
Elastic Waves ◽  
Phononic Crystal ◽  
Stop Band ◽  
Slope Angle ◽  
Band Gaps ◽  
Pass Band ◽  
Wave Band ◽  
Sh Wave ◽  
Plane Sh Wave

The dispersive characteristic of anti-plane elastic waves propagating through laminated piezoelectric phononic crystal is studied in this paper. First, the transfer matrix method (TMM) and the Bloch theorem are used to derive the dispersion equation. Next, the dispersion equation is solved numerically and the dispersive curves are shown in Brillouin zone. The pass band and the stop band of anti-plane SH wave propagating perpendicular to and oblique to the laminated periodic structure are compared. The effects of the slope angle on the wave band structure are discussed.

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