TITLE

Rayleigh wave diffraction from surface-breaking discontinuities

AUTHOR(S)
Tittmann, B. R.; Ahlberg, L. A.; Mal, A. K.
PUB. DATE
November 1986
SOURCE
Applied Physics Letters;11/17/1986, Vol. 49 Issue 20, p1333
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This letter presents theoretical and experimental results treating the interaction between Rayleigh waves and surface-breaking discontinuities, such as cracks and grooves, in the regime where crack depth is large compared to the Rayleigh wavelength. Particular emphasis is placed on the mode conversion to bulk waves at the crack tip. Radiation patterns are presented for both the longitudinal and shear wave contributions. The experimental data agree well with theory and show that the generation of shear waves polarized perpendicular to the crack face is particularly efficient.
ACCESSION #
9821447

 

Related Articles

  • A Device for Measuring the Velocity of Ultrasonic Waves: An Application to Stress Analysis. M. Sgalla; Dario Vangi // Experimental Mechanics;Feb2004, Vol. 44 Issue 1, p85 

    In this paper we present a device for the practical application of an ultrasonic critical-angle refractometry (UCRfr) technique. UCRfr is a technique for measuring the velocity of longitudinal, shear and Rayleigh waves, developed to improve the traditional ultrasonic methods for measuring the...

  • Shear wave velocity models retrieved using Rg wave dispersion data in shallow crust in some regions of southern Ontario, Canada. Ma, Shutian; Motazedian, Dariush; Corchete, Victor // Journal of Seismology;Apr2013, Vol. 17 Issue 2, p683 

    Many crucial tasks in seismology, such as locating seismic events and estimating focal mechanisms, need crustal velocity models. The velocity models of shallow structures are particularly important in the simulation of ground motions. In southern Ontario, Canada, many small shallow earthquakes...

  • Rayleigh wave propagation along the boundary of a non-Newtonian fluid-saturated porous medium. Markov, M. // Acoustical Physics;Jul2006, Vol. 52 Issue 4, p429 

    The Frenkel-Biot theory is used to study the reflection of elastic waves from the boundary of a non-Newtonian (Maxwell) fluid-saturated porous medium. The velocity and attenuation of a Rayleigh surface wave propagating along the boundary of the medium are determined. Two models of a...

  • Higher effect of the surface waves during massive blasting with nonelectric initiation at open pits. Muchnik, S. // Journal of Mining Science;Sep2009, Vol. 45 Issue 5, p459 

    The paper demonstrates that massive blasting at open pits with using the nonelectric initiation system SINV (analog of Nonel) generates free surfaces where the Rayleigh waves arise, that improve loosening of the shattered rock mass.

  • Reflection and transmission of the surface P-waves on the line of jump in elastic parameters. Kirpichnikova, N.; Krauklis, P.; Krauklis, A. // Journal of Mathematical Sciences;Feb2008, Vol. 148 Issue 5, p693 

    Problems of diffraction of elastic surface waves of horizontal polarization (P-waves) on a line of jump in elastic parameters are considered. The corresponding coefficients of reflection, refraction, and transmission are obtained by means of the parabolic equation method. A comparison of the...

  • Microdistortions in the crystal lattice of steel IIIX15 as estimated via the optoacoustic method and velocimetry. Vladimirov, A.; Gorkunov, E.; Eremin, P.; Zadvorkin, S. // Russian Journal of Nondestructive Testing;Sep2006, Vol. 42 Issue 9, p582 

    Crystal-lattice microdistortions in thermally treated steel IIIX15 are estimated via measurement of Rayleigh waves’ propagation velocity by means of the technique based on speckle dynamic interferometry. A special feature of this technique is noncontact determination of the elastic-wave...

  • Elastodynamic Doppler effects. Watanabe, Kazumi; Biwa, S. // Acta Mechanica;Jan2008, Vol. 195 Issue 1-4, p27 

    The Doppler effect is discussed for flexure waves in beam and plate, three body waves (P, SV, SH) in an infinite solid, modal SH waves in a thick plate and a Rayleigh wave on the surface of a semi-infinite solid. The exact closed form solution for each elasto-dynamic problem is obtained and the...

  • Rayleigh lamb waves in micropolar isotropic elastic plate. Rajneesh Kumar; Geeta Partap // Applied Mathematics & Mechanics;Aug2006, Vol. 27 Issue 8, p1049 

    The propagation of waves in a homogeneous isotropic micropolar elastic cylindrical plate subjected to stress free conditions is investigated. The secular equations for symmetric and skew symmetric wave mode propagation are derived. At short wave limit, the secular equations for symmetric and...

  • Theoretical Estimate for the Parameters of Ultrasonic Impulses Excited in Geomaterials by Laser Emission. Karabutov, A. A.; Makarov, V. A.; Shkuratnik, V. L.; Cherepetskaya, E. B. // Journal of Mining Science;Jul/Aug2003, Vol. 39 Issue 4, p323 

    Using the transfer function method as a base, the analytical relations are obtained, as well as the main parameters are calculated for the ultrasonic impulses of longitudinal, transverse, and the Rayleigh waves excited in geomaterials by laser emission.

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics