Interface wave mode propagation in clad rod acoustic waveguides

1984 ◽  
Vol 75 (S1) ◽  
pp. S78-S78
Author(s):  
Susan J. Hanna ◽  
Richard O. Claus
Keyword(s):  
Wave Mode ◽  
Mode Propagation ◽  
Interface Wave ◽  
Acoustic Waveguides

The fundamental ultrasonic edge wave mode: Propagation characteristics and potential for distant damage detection

Ultrasonics ◽  
2021 ◽  
Vol 114 ◽  
pp. 106369
Author(s):  
James M. Hughes ◽  
Munawwar Mohabuth ◽  
Andrei Kotousov ◽  
Ching-Tai Ng
Keyword(s):  
Damage Detection ◽  
Wave Mode ◽  
Edge Wave ◽  
Mode Propagation ◽  
Propagation Characteristics

scholarly journals Krauklis wave in a stack of alternating fluid-elastic layers

Geophysics ◽  
2011 ◽  
Vol 76 (6) ◽  
pp. N47-N53 ◽  
Author(s):  
Valeri A. Korneev
Keyword(s):  
Fluid Layer ◽  
Wave Mode ◽  
Dispersive Wave ◽  
Low Frequencies ◽  
Interface Waves ◽  
Wave Velocities ◽  
Interface Wave ◽  
Fracture Mapping ◽  
Elastic Layers ◽  
Second Wave

The Krauklis wave is a slow dispersive wave mode that propagates in a fluid layer bounded by elastic media. In a model of alternating fluid and elastic layers, two interface waves can exist at low frequencies: The first wave propagates mostly in the elastic layer and has little dispersion, while the second wave can have strong dispersion and propagates as a Krauklis wave for some parameter combinations. Analytical conditions predict appearance of the Krauklis wave for higher frequencies and low porosities. Interface-wave velocities depend on model porosity, which potentially can be used for fracture mapping.

Ultrasonic Interface Wave for Interlaminar Crack Detection in Steel–Titanium Composite Pipe

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Fei Tian ◽  
Bing Li ◽  
Weimeng Zhou
Keyword(s):  
Crack Detection ◽  
Crack Depth ◽  
Excitation Frequency ◽  
Interfacial Crack ◽  
Wave Mode ◽  
Composite Pipe ◽  
Interface Wave ◽  
Interlaminar Crack ◽  
Bimetal Composite Pipe ◽  
Bimetal Composite

The bimetal composite pipe has found wide ranging applications in engineering owing to its excellent mechanical and physical performances. However, the interlaminar cracks which are usually invisible and inaccessible may occur in the bimetal composite pipe and are difficult to detect. The ultrasonic interface wave, which propagates along the interface with high displacement amplitudes and low dispersion at high frequencies, provides a promising nondestructive testing (NDT) method for detecting cracks in the bimetal composite pipe. In this study, the interlaminar crack detection method in the steel–titanium composite pipe is investigated analytically and experimentally by using interface wave. The interface wave mode in steel–titanium composite pipe is first identified and presented by theoretical analyses of dispersion curves and wave structures. The selection of suitable excitation frequency range for NDT is discussed as well. Then an experiment is conducted to measure the interface wave velocities, which are in good agreement with the corresponding numerical results. In addition, interlaminar cracks with different locations in steel–titanium composite pipe are effectively detected and located, both in the axial and circumferential directions. Finally, the relationship between the reflection coefficient and the crack depth is experimentally studied to predict the reflection behavior of interface wave with crack. The numerical and experimental results show the interface wave is sensitive to interfacial crack and has great potentials for nondestructive evaluation in the bimetal composite pipe.

Multiband acoustic waveguides constructed by two-dimensional phononic crystals

2020 ◽  
Vol 13 (9) ◽  
pp. 094001
Author(s):  
Wei Zhao ◽  
Yunfei Xu ◽  
Yuting Yang ◽  
Zhi Tao ◽  
Zhi Hong Hang
Keyword(s):  
Phononic Crystals ◽  
Two Dimensional ◽  
Acoustic Waveguides

Wave-Mode Coordinates and Scattering Matrices for Wave Propagation.

1986 ◽  
Author(s):  
James H. Williams ◽  
Nagem Jr. ◽  
Yeung Raymond J. ◽  
Hubert K.
Keyword(s):  
Wave Propagation ◽  
Wave Mode ◽  
Scattering Matrices
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