scholarly journals Propagation of leaking interface waves

1961 ◽  
Vol 51 (4) ◽  
pp. 527-555
Author(s):  
Robert A. Phinney
Keyword(s):  
P Wave ◽  
Transient Signal ◽  
New Wave ◽  
Wave Problem ◽  
Interface Waves ◽  
Solid Interface ◽  
Interface Wave ◽  
Physical Importance ◽  
Single Integral ◽  
Simple Interface

Abstract With simple generalizations of the method due to Rosenbaum (1961) and Phinney (1961), single integral expressions may be written down for the long range pole contributions to the transient signal in a plane seismic waveguide. This method yields expressions for the leaking, or imperfectly trapped waves, and suffers from no restriction on the number of layers or the existence of coupling to one or two half-spaces. When it is applied to the simple interface wave problem of two halfspaces in contact, closed form expressions are obtained describing the propagation of pulses along the interface due to lower sheet poles. The theory is applied to the Lamb problem, the liquid/solid interface, and the solid/solid interface problems. The leaking wave generalizations of the Rayleigh and Stoneley waves are found and a new wave, coupled to the P-wave, is demonstrated. The physical importance of leaking interface pulses is shown to be in their coupling to the normal or leaking oscillations of layered structures.

Waves at a Flexibly Bonded Interface

1967 ◽  
Vol 34 (4) ◽  
pp. 905-909 ◽  
Author(s):  
J. P. Jones ◽  
J. S. Whittier
Keyword(s):  
Frequency Equation ◽  
Wave Problem ◽  
Bond Behavior ◽  
Interface Waves ◽  
Rayleigh Surface Waves ◽  
Bonded Interface ◽  
Interface Wave ◽  
The Media ◽  
Limiting Case ◽  
Intermediate Bond

Plane strain-elastic wave propagation is studied for two dissimilar half spaces joined together at a plane interface by an elastic bond. The bond thickness is assumed to be small compared to the wavelength, and an appropriately simplified description of the bond behavior is introduced. Attention is focused on solutions corresponding to the propagation of interface waves along the bond. The existence of interface waves is found to be governed by a parameter involving bond stiffness and wavelength. The limiting case of an infinitely stiff bond corresponds to the interface wave problem first solved by Stoneley, and it is shown that the present analysis yields Stoneley’s frequency equation in this limit. Also, the limiting case of an infinitely soft bond is found as expected to give two Rayleigh surface waves, one in each medium. It is shown analytically that, for intermediate bond stiffnesses, there may occur zero, one, or two interface waves, depending on the properties of the bond and the media. Illustrative numerical examples are presented. It is the conclusion of this study that account must be taken of the stiffness of the bond and the wavelength of the disturbance before it is proper to speak of an interface wave existing or not existing at a bonded interface.

Leaky Interface Waves Optical Detection at Solid-Solid Interface

2013 ◽  
Vol 543 ◽  
pp. 5-8
Author(s):  
Qing Bang Han ◽  
Hao Wang ◽  
Jian Li ◽  
Chang Ping Zhu
Keyword(s):  
Wave Amplitude ◽  
Leaky Waves ◽  
Interface Waves ◽  
Solid Interface ◽  
Attenuation Characteristic ◽  
Technological Potential ◽  
Interface Wave ◽  
Successful Measurement ◽  
Good Agreement ◽  
Effect Technique

The experimental investigation on transparent solid/solid (Aluminum and Plexiglas) interface leaky waves generated by a pulse laser and detected with a photo elastic effect technique is reported. Three waves Lateral wave, Leaky Rayleigh (LR) wave and Leaky Interface wave (IW) are detected successfully; The velocity of the detected interface wave is in good agreement with theoretical calculation and the attenuation characteristic of the two Leaky waves is also in accordance with the theoretical prediction. The Leaky waves propagate along the weak bonding interface is also measured, it was found with the continue Epoxy solidifying, the wave amplitude gradually decrease and the two Leaky waves are more difficult to distinguish. The successful measurement should improve the scientific and technological potential for the research of solid/solid interface waves.

scholarly journals On the Existence of Hydromagnetic Interface Waves at a Structured Atmosphere

1990 ◽  
Vol 142 ◽  
pp. 262-263
Author(s):  
K. Somasundaram ◽  
S. Manthiramoorthi ◽  
A. Sathya Narayanan
Keyword(s):  
Phase Velocity ◽  
Interface Waves ◽  
Photospheric Level ◽  
Interface Wave

The conditions under which the hydromagnetic interface waves can exist at a magnetic interface is deduced. Using these conditons, it is shown that a slow interface wave with a phase velocity about 5Km/s and a fast interface wave with a phase velocity 6.5 to 8km/s at the photospheric level can exist.

A line source on a solid-solid interface—A study of the pseudo-Stoneley wave

1972 ◽  
Vol 62 (4) ◽  
pp. 1017-1027
Author(s):  
C. N. G. Dampney
Keyword(s):  
Closed Form ◽  
Line Source ◽  
Stoneley Wave ◽  
Elastic Media ◽  
Ray Theory ◽  
Interface Waves ◽  
Solid Interface ◽  
Direct Head ◽  
Fresh Insight ◽  
Insight Into

Abstract The displacement caused by a source on an interface between two solid semi-infinite elastic media presents an excellent study in interference between direct, head and interface waves. The solution herein derived provides fresh insight into the nature of pseudo-Stoneley interface waves. As well, the evolution of the head and direct waves is discerned as they move away from the interface. The technique used to solve the problem demonstrates the simplicity of using Sherwood's (1958) method with generalized ray theory. The displacement is simply expressed in a closed form which can be rapidly evaluated and is straightforward to interpret physically.

Scaled behavior of interface waves at an imperfect solid-solid interface

2012 ◽  
Vol 112 (2) ◽  
pp. 024904 ◽  
Author(s):  
Tony Valier-Brasier ◽  
Thomas Dehoux ◽  
Bertrand Audoin
Keyword(s):  
Interface Waves ◽  
Solid Interface
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