EMAT generation and laser detection of single lamb wave modes

Zhiqi Guo, J. D. Achenbach, Sridhar Krishnaswamy*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

The use of a single Lamb wave mode simplifies the interpretation of data in nondestructive testing of thin plates. In this work, an EMAT is specially configured to generate single Lamb wave modes and laser interferometry is used to detect the wave. A broadband path-stabilized Michelson interferometer is first used to check the conditions under which the EMAT truly generates a single mode on a thin plate. As an illustrative application of this system, the subsequent interaction of a single Lamb wave mode with crack-like notches is observed at high spatial resolution using the laser interferometer.

Original languageEnglish (US)
Pages (from-to)423-429
Number of pages7
JournalUltrasonics
Volume35
Issue number6
DOIs
StatePublished - Sep 1997

Keywords

  • EMAT
  • Lamb wave
  • Laser interferometer
  • NDE
  • Ultrasound

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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