Guided wave testing optimization

Thomas R. Hay, Joseph Lawrence Rose

Research output: Contribution to specialist publicationArticle

6 Scopus citations

Abstract

Due to the dispersive nature of ultrasonic guided waves, it is useful to evaluate the potential of using a variety of different modes over a wide frequency and phase velocity range for a given testing application. This approach locates the optimal guided wave mode by observing the interaction between the wide range of possible displacement and stress fields in the wave guide and the discontinuity sought. By electronically time delaying the input to the individual elements of a piezoelectric array, it is possible to modify the phase velocity spectrum, permitting multimode experimentation with a single transducer. This paper discusses the advantages of using this approach for guided wave feasibility studies. Fatigue crack detection in the SH-60 transmission support beam is given as a sample application where the results from a tuning feasibility study were successfully implemented in the field.

Original languageEnglish (US)
Pages1239-1244
Number of pages6
Volume60
No10
Specialist publicationMaterials Evaluation
StatePublished - Oct 1 2002

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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