On the Dispersion Relations for the Anti-Plane Surface Wave in the Second Gradient Electroelasticity

2021 ◽  
Vol 42 (8) ◽  
pp. 1935-1943
Author(s):  
Y. Solyaev ◽  
A. Ustenko
Keyword(s):  
Surface Wave ◽  
Plane Surface ◽  
Dispersion Relations ◽  
Second Gradient

An Experimental Surface-Wave Method for Recording Force-Time Curves in Elastic Impacts

1959 ◽  
Vol 26 (1) ◽  
pp. 3-7
Author(s):  
J. N. Goodier ◽  
W. E. Jahsman ◽  
E. A. Ripperger
Keyword(s):  
Surface Wave ◽  
Plane Surface ◽  
Hopkinson Pressure Bar ◽  
Time Curve ◽  
Experimental Surface ◽  
Force Time ◽  
Steel Balls ◽  
Pressure Bar ◽  
Surface Wave Method ◽  
The Impact

Abstract The recording of impacts by means of the longitudinal strain wave generated in a Hopkinson pressure bar is no longer possible when the impact is very brief, on account of dispersive effects. The Rayleigh surface wave generated on the plane surface of a block is nondispersive. A method is given for deducing the force-time curve of the impact from the oscilloscope record of the surface wave, and applied to impacts of small steel balls on a block.

THE GROUP VELOCITY OF PLANE SURFACE WAVES

1960 ◽  
Vol 38 (6) ◽  
pp. 779-786 ◽  
Author(s):  
A. G. Mungall ◽  
D. Morris
Keyword(s):  
Surface Wave ◽  
Group Velocity ◽  
Plane Surface ◽  
Wave Mode ◽  
Theoretical Treatment ◽  
First Order ◽  
Mode Effects ◽  
Surface Wave Propagation ◽  
Group Velocities ◽  
Good Agreement

The velocity of transmission of a modulated microwave signal over a dielectric-covered plane conductor has been measured over a range of dielectric thicknesses for which the first order TM surface wave mode is known to propagate. An exact theoretical treatment of plane surface wave group velocity for both TM and TE surface wave modes of any order has been developed and calculations carried out for the first two orders. The experimentally determined signal velocities are in good agreement with the group velocities calculated for the first order TM mode. Effects of possible surface wave propagation on the accuracy of microwave distance-measuring methods are discussed.

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