Zero order mode selective excitation and highly resolved observations of lamb waves

2011 ◽  
Author(s):  
A. Abdelrahman ◽  
U. Amjad ◽  
D. Jha ◽  
K. S. Tarar ◽  
W. Grill
Keyword(s):  
Lamb Waves ◽  
Selective Excitation ◽  
Zero Order ◽  
Order Mode

scholarly journals Locating Delamination in Composite Laminated Beams Using the Zero-Order Mode of Lamb Waves

10.5772/49991 ◽  
2012 ◽  
Author(s):  
Yaolu Liu ◽  
Alamusi ◽  
Jinhua Li ◽  
Huiming Ning ◽  
Liangke Wu ◽  
...  
Keyword(s):  
Lamb Waves ◽  
Zero Order ◽  
Order Mode ◽  
Laminated Beams

Dispersion Characteristic of the Symmetric Slab Waveguide with Chiral Negative Refractive Medium

2014 ◽  
Vol 571-572 ◽  
pp. 915-919
Author(s):  
Xiao Xue Xu ◽  
Zhong Yin Xiao ◽  
Quan Wen Ma ◽  
Xiao Long Ma ◽  
De Jun Liu ◽  
...  
Keyword(s):  
Maxwell Equations ◽  
Dispersion Characteristic ◽  
Constitutive Relations ◽  
Great Influence ◽  
Zero Order ◽  
Slab Waveguide ◽  
Order Mode ◽  
The Core ◽  
Left Handed ◽  
Refractive Medium

According to Maxwell equations and constitutive relations in chiral medium, the dispersion characteristic of the symmetric slab waveguide with chiral negative refractive medium is studied. The dispersion equations expressed in the normalized parameter are deduced in the slab waveguide. The numerical results show that the chiral parameter has great influence on the dispersion characteristic of slab waveguide. When the relative chiral parameter is about 0.0477, the zero order mode of left-handed polarized wave disappears. While it is greater than 1, the core becomes chiral negative refractive medium and the zero order mode disappears. In addition, compared with the general chiral waveguide, the tendency of dispersion curves in slab waveguide with chiral negative refractive medium is also analyzed.

Negative refraction of zero order flexural Lamb waves through a two-dimensional phononic crystal

2010 ◽  
Vol 97 (12) ◽  
pp. 121919 ◽  
Author(s):  
J. Pierre ◽  
O. Boyko ◽  
L. Belliard ◽  
J. O. Vasseur ◽  
B. Bonello
Keyword(s):  
Negative Refraction ◽  
Lamb Waves ◽  
Phononic Crystal ◽  
Zero Order ◽  
Two Dimensional

DIPOLE ANTENNA WITH LEFT-HANDED LOADING OPERATING AT A ZERO ORDER MODE

2011 ◽  
Vol 19 ◽  
pp. 85-92 ◽  
Author(s):  
Alejandro Lucas Borja ◽  
James R. Kelly ◽  
Qing Liu ◽  
Peter S. Hall ◽  
Zhen Hua Hu
Keyword(s):  
Dipole Antenna ◽  
Zero Order ◽  
Order Mode ◽  
Left Handed

Mode selective excitation and detection of Lamb waves

2010 ◽  
Author(s):  
K. Hahn ◽  
U. Amjad ◽  
K. S. Tarar ◽  
D. Jha ◽  
W. Grill
Keyword(s):  
Lamb Waves ◽  
Selective Excitation

scholarly journals The Peculiarities of the Acoustic Waves of Zero-Order Focusing in Lithium Niobate Plate

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4000
Author(s):  
Iren Kuznetsova ◽  
Ilya Nedospasov ◽  
Andrey Smirnov ◽  
Vladimir Anisimkin ◽  
Dmitry Roshchupkin ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Electric Fields ◽  
Acoustic Waves ◽  
Transfer Functions ◽  
Lamb Waves ◽  
Zero Order ◽  
Beam Focusing ◽  
Acoustic Beams ◽  
Hybrid Devices ◽  
Shear Horizontal

In this research, beam focusing in lithium niobate plate was studied for fundamental anti-symmetric (A0) and symmetric (S0) Lamb waves, and the shear-horizontal (SH0) wave of zero-order. Using the finite element method, appropriate configuration of the interdigital transducer with arc-like electrodes was modeled accounting for the anisotropy of the slowness curves and dispersion of the modes in the plate. Profiles of the focalized acoustic beams generated by the proposed transducer were theoretically analyzed. Based on the result of the analysis, relevant delay lines were fabricated and transfer functions (insertion loss) of the line were measured for SH0 wave in YX-lithium niobate plate. Using an electron scanning microscope, distribution of the electric fields of the same wave were visualized. The results of this study may be useful for hybrid devices and sensors combining nano and acoustoelectronic principles.

Study on measurement of dispersive characteristics of higher order mode Lamb waves

Ultrasonics ◽  
2006 ◽  
Vol 44 ◽  
pp. e911-e915 ◽  
Author(s):  
Wei Lin ◽  
Li Fan ◽  
Changming Gan ◽  
Boling Xu ◽  
Zhemin Zhu
Keyword(s):  
Lamb Waves ◽  
Higher Order ◽  
Order Mode ◽  
Higher Order Mode
Sign in / Sign up

Export Citation Format

Share Document