Abstract
Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions of the free-rigid, free-slip, and slip-rigid types are theoretically analyzed. It is shown that it is fundamentally possible to substantially increase the sensitivity and reliability of evaluations of the quality of the cohesion between materials. This can be done via selection of the spatial position of a PET, as well as selection of the incidence angles of an acoustic beam at which the phase shift φ D between waves reflected from surface areas with different boundary conditions is nonzero and, if possible, close to ±π. In this case, interference results in a substantial change in the amplitude of reflected waves depending on their reception angle. The features of changes in the field of reflected elastic waves upon intersection of the boundary of a defective region with an acoustic-beam spot are analyzed (in the 2D-formulation) for discrete and linear changes in φ D .
Similar content being viewed by others
References
Nerazrushayushchii kontrol’: Spravochnik (Nondestructive Testing and Diagnostics: Handbook in 7 vols.), Klyuev, V.V., Ed., Moscow: Mashinostroenie, 2003, vol. 3.
Kruger, S.E., Lord, M., Levesque, D., and Bakker, A.J., Detection of Kissing Bond in Extruded Aluminum by Laser-Ultrasound, Review of Progress in Quantitative Nondestructive Evaluation, Golden, Colorado, pp. 22–27.
Kim, H.-J., Song, S.-J., Kim, D.-Y., and Kwon, S.-D., Evaluation of Thin Coating Layers Using Rayleigh-Like Waves, Review of Progress in Quantitative Nondestructive Evaluation, Golden, Colorado, pp. 22–27.
Chambers, J.K. and Tucker, J.R., Bound Line Analysis Using Swept-Frequency Ultrasonic Spectroscopy, Insight, 1999, vol. 41, no. 3.
Santo, J.B. and Santon, M.J., Ultrasonic Interferometry for the Evaluation of Thickness and Adhesion of Thin Layers, Abstracts of 4th Int. Conf. on NDT, China, Greece, 2007 p. 22.
Brekhovskikh, L.M. and Godin, O. A., Akustika sloistykh sred (Acoustics of Layered Media), Moscow: Nauka, 1989.
Skuchik, E., Osnovy akustiki, (Fundamentals of Acoustics), Moscow: Mir, 1976, vol. 1.
Baev, A.R., Imboden, M., and Asadchaya, M.V., Simulation of Reflection of Ultrasonic Waves from an Interface with Mixed Boundary Conditions, Sbornik tezisov dokladov 3-i mezhdunarodnoi nauchnoi konferentsii “Komp’yuternye metody i obratnye zadachi v nerazrushayushchem kontrole i diagnostike” (Abstracts of Papers of the Third Int. Conf. “Computer Methods and Inverse Problems in Nondestructive Testing and Diagnostics”), Moscow, 2002.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © A.R. Baev, M.V. Asadchaya, 2010, published in Defektoskopiya, 2010, Vol. 46, No. 8, pp. 3–17.
Rights and permissions
About this article
Cite this article
Baev, A.R., Asadchaya, M.V. Features of the reflection of an acoustic beam from a surface with nonuniform boundary conditions. I. Theoretical analysis. Russ J Nondestruct Test 46, 547–558 (2010). https://doi.org/10.1134/S1061830910080012
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1061830910080012