Rayleigh wave speed

SASW-result (dispersion curve) showing Rayleigh Wave speed as a function of wavelength (depth)... 

The Rayleigh wave speed of sound Cr is determined by the equation ... 

D Modelling of Impact Failure in Sandwich Structures notice that the crack speed along the lower interface reaches the Rayleigh wave speed soon... 

It is well known that in a viscoelastic body energy losses decrease at high frequencies, so that the behavior becomes elastic again. It can be anticipated that the function <() (a,pv) first increases, then decreases when the crack speed increases. However crack speed is limited to the Rayleigh waves speed, and another loss mechanism (such as acoustic emission) must occur at these high speeds. Thus, the ()) (a v) curve would appear S shaped, with a maximum... 

Simons, F. J., van der Hilst, R. D., Montagner J.-P. ZiELHUls, A. 2001. Multimode Rayleigh wave inversion for shear wave speed heterogeneity and azimuthal anisotropy of the Australian upper mantle. Geophysical Journal Interrmtional, 203, 1-17. 

Another type of stress analysis attributes surface erosion to high-speed combustion waves that initiate Rayleigh surface waves. These amplify resonantly in the elastic material and intense peak stresses develop very close to the surface [201]. 

A fisherman standing on the edge of a fast-moving river can see around and downstream of his line a remarkable capillary wake that has fascinated physicists (such as Lord Rayleigh, Lamb, Lighthill, and others) for a cen-tury.30,31 rj Yie wake forms only when the speed of the river relative to the line exceeds the minimum velocity c of the associated waves. Generally speaking, the entire structure of the wake can be analyzed in detail with the help of equation (5.55). The interested reader may want to catch up with recently published developments on this topic. 

We note that on the surface of the solid there can only exist shear waves the speed of propagation of these waves, called the Rayleigh speed cr, is typically cr 0.9Cs. 

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