SH wave propagation in joined half-spaces composed of elastic metamaterials

2017 ◽  
Vol 122 (21) ◽  
pp. 215104 ◽  
Author(s):  
Xiaona Shi ◽  
Haisheng Shu ◽  
Haiyong Zhou ◽  
Lei Zhao ◽  
Ru Liu ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Sh Wave ◽  
Elastic Metamaterials

SH wave propagation in a periodic cement-based piezoelectric layered barrier

2021 ◽  
pp. 1-9
Author(s):  
Haozhe Jiang ◽  
Zhanhua Cai ◽  
Lili Yuan ◽  
Tingfeng Ma ◽  
Jianke Du ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Sh Wave

Elastic wave propagation in metamaterial rods with periodic shunted piezo-patches

2021 ◽  
Vol 263 (2) ◽  
pp. 4303-4311
Author(s):  
Edson J.P. de Miranda ◽  
Edilson D. Nobrega ◽  
Leopoldo P.R. de Oliveira ◽  
José M.C. Dos Santos
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Wave Attenuation ◽  
Periodic Structures ◽  
Band Gaps ◽  
Low Frequencies ◽  
Periodic Arrays ◽  
Extended Plane ◽  
Elastic Metamaterials ◽  
Piezoelectric Structures

The wave propagation attenuation in low frequencies by using piezoelectric elastic metamaterials has been developed in recent years. These piezoelectric structures exhibit abnormal properties, different from those found in nature, through the artificial design of the topology or exploring the shunt circuit parameters. In this study, the wave propagation in a 1-D elastic metamaterial rod with periodic arrays of shunted piezo-patches is investigated. This piezoelectric metamaterial rod is capable of filtering the propagation of longitudinal elastic waves over a specified range of frequency, called band gaps. The complex dispersion diagrams are obtained by the extended plane wave expansion (EPWE) and wave finite element (WFE) approaches. The comparison between these methods shows good agreement. The Bragg-type and locally resonant band gaps are opened up. The shunt circuits influence significantly the propagating and the evanescent modes. The results can be used for elastic wave attenuation using piezoelectric periodic structures.

scholarly journals Non-reciprocal wave propagation in modulated elastic metamaterials

2017 ◽  
Vol 473 (2202) ◽  
pp. 20170188 ◽  
Author(s):  
H. Nassar ◽  
H. Chen ◽  
A. N. Norris ◽  
M. R. Haberman ◽  
G. L. Huang
Keyword(s):  
Wave Propagation ◽  
Elastic Wave ◽  
Effective Mass ◽  
Mass Operator ◽  
High Amplitude ◽  
Coupled Mode Theory ◽  
Coupled Mode ◽  
Transient Regimes ◽  
Elastic Metamaterials ◽  
Large Frequency

Time-reversal symmetry for elastic wave propagation breaks down in a resonant mass-in-mass lattice whose inner-stiffness is weakly modulated in space and in time in a wave-like fashion. Specifically, one-way wave transmission, conversion and amplification as well as unidirectional wave blocking are demonstrated analytically through an asymptotic analysis based on coupled mode theory and numerically thanks to a series of simulations in harmonic and transient regimes. High-amplitude modulations are then explored in the homogenization limit where a non-standard effective mass operator is recovered and shown to take negative values over unusually large frequency bands. These modulated metamaterials, which exhibit either non-reciprocal behaviours or non-standard effective mass operators, offer promise for applications in the field of elastic wave control in general and in one-way conversion/amplification in particular.

Viscoelastic Circumferential SH Wave in Graded Hollow Cylinders

2014 ◽  
Vol 543-547 ◽  
pp. 7-11
Author(s):  
X.D. Yang ◽  
J.G. Yu
Keyword(s):  
Wave Propagation ◽  
Nondestructive Evaluation ◽  
Functionally Graded Material ◽  
Functionally Graded ◽  
Polynomial Method ◽  
Sh Wave ◽  
Graded Material ◽  
Viscoelastic Theory ◽  
Hollow Cylinders ◽  
Dispersion And Attenuation

In this article, circumferential SH wave propagation in functionally graded material (FGM) hollow cylinders is investigated. Based on the Kelvin-Voigt viscoelastic theory, the controlling differential equations in terms of displacements are deduced. By the Legendre polynomial method, the asymptotic solutions are obtained. Through the numerical results, the influences of gradient profile and the influences of the radius to thickness ratio on dispersion and attenuation are illustrated. The work is crucial for guided ultrasonic nondestructive evaluation for graded hollow cylinders.

Gradient surface ply model of SH wave propagation in SAW sensors

1999 ◽  
Vol 15 (2) ◽  
pp. 155-163 ◽  
Author(s):  
Liang Wei ◽  
Shen Yapeng
Keyword(s):  
Wave Propagation ◽  
Sh Wave ◽  
Gradient Surface

SH Wave Propagation in Viscoelastic Media

2004 ◽  
Vol 48 (3) ◽  
pp. 563-587 ◽  
Author(s):  
P.F. Daley ◽  
E.S. Krebes
Keyword(s):  
Wave Propagation ◽  
Sh Wave ◽  
Viscoelastic Media
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