New technique to detect surface waves and measure their velocities

Tribikram Kundu, Bruce Maxfield

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A low frequency (0.5 - 2.5 Mhz) acoustic microscope is used to generate and detect surface waves in isotropic and anisotropic solids. In this microscope one transducer with a cylindrical concave front face produces a line focused ultrasonic beam which strikes the specimen at any desired angle. The reflected beam is received by another transducer. When the incident angle of the striking beam becomes equal to the critical angle of the reflector, surface waves are generated otherwise the beam is specularly reflected without generating any surface wave. It is shown in this paper that by measuring the change in the arrival time as the distance between the reflecting surface and the transducer changes one can predict if the surface waves have been generated or not. Experiments are carried out with copper and aluminum blocks and graphite-epoxy (graphite fibers in epoxy matrix) composite plate. It is found that it is easier to generate and detect surface waves in isotropic metallic blocks where Rayleigh waves are nondispersive than anisotropic graphite epoxy composite plate where Lamb waves are dispersive.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
PublisherPubl by ASME
Pages81-98
Number of pages18
Volume140
ISBN (Print)0791810755
StatePublished - 1992
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Anaheim, CA, USA
Duration: Nov 8 1992Nov 13 1992

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAnaheim, CA, USA
Period11/8/9211/13/92

Fingerprint

Surface waves
Transducers
Acoustic microscopes
Graphite epoxy composites
Graphite fibers
Rayleigh waves
Microscopes
Ultrasonics
Copper
Aluminum
Composite materials
Experiments

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Kundu, T., & Maxfield, B. (1992). New technique to detect surface waves and measure their velocities. In American Society of Mechanical Engineers, Applied Mechanics Division, AMD (Vol. 140, pp. 81-98). Publ by ASME.

New technique to detect surface waves and measure their velocities. / Kundu, Tribikram; Maxfield, Bruce.

American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 140 Publ by ASME, 1992. p. 81-98.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kundu, T & Maxfield, B 1992, New technique to detect surface waves and measure their velocities. in American Society of Mechanical Engineers, Applied Mechanics Division, AMD. vol. 140, Publ by ASME, pp. 81-98, Winter Annual Meeting of the American Society of Mechanical Engineers, Anaheim, CA, USA, 11/8/92.
Kundu T, Maxfield B. New technique to detect surface waves and measure their velocities. In American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 140. Publ by ASME. 1992. p. 81-98
Kundu, Tribikram ; Maxfield, Bruce. / New technique to detect surface waves and measure their velocities. American Society of Mechanical Engineers, Applied Mechanics Division, AMD. Vol. 140 Publ by ASME, 1992. pp. 81-98
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