Characterization of Surface Cracks Using Rayleigh Waves

Journal Article · Sat Apr 09 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1916757· OSTI ID:20655391

Masserey, B; Mazza, E ^[1]

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1. Department of Mechanical Engineering, ETH Zurich, CH-8092 Zurich (Switzerland)

The characterization of surface cracks in steel plates using surface acoustic waves is investigated. In the experiments Rayleigh wave is generated by a standard wedge technique and the surface displacement is measured pointwise by means of a heterodyne laser interferometer. The presence of a crack in the acoustic field leads to an amplitude increase due to the scattering of the surface wave at the defect. The time-of-flight method is extended to crack depth smaller than the wavelength by correlating the time delay of the transmitted wave with the defect depth. The method is shown to provide good results for defect depths down to 0.2 mm.

• OSTI ID: 20655391
• Journal Information: AIP Conference Proceedings, Vol. 760, Issue 1; Conference: Conference on review of progress in quantitative nondestructive evaluation, Golden, CO (United States), 25-30 Jul 2004; Other Information: DOI: 10.1063/1.1916757; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
AMPLITUDES
CRACKS
DEFECTS
DETECTION
INTERFEROMETERS
LASERS
NONDESTRUCTIVE TESTING
RAYLEIGH WAVES
SCATTERING
SOUND WAVES
STEELS
SURFACES
TIME DELAY
TIME-OF-FLIGHT METHOD
WAVELENGTHS