Laser-Generated Acoustic Signal Interaction with Surface Flaws on Rail Wheels

Donatella Cerniglia, Donatella Cerniglia, Shant Kenderian, B. Boro Djordjevic, Robert E. Green Jr.

Risultato della ricerca: Articlepeer review

7 Citazioni (Scopus)

Abstract

Long- and short-range acoustic-signal interaction with surface-breaking cracks and geometric boundaries of the rail-wheel tread area are presented in this article. Ultrasonic signals are generated using a laser-line source of varying length and distance from a crack and are detected with a 1-MHz contact transducer to map the sound field behind the crack in the near, intermediate, and far fields of the insonified region. The factors that affect the behavior of a laser-generated surface acoustic wave propagating along the tread area of a rail wheel are discussed. A signal normalization method is proposed to help in sensing the presence of a crack from the transmitted signal unaffected by the boundary effect of the complicated wheel geometry, diffraction of the acoustic wave around the crack tip, and source-to-crack length ratio and separation distance.
Lingua originaleEnglish
pagine (da-a)195-207
Numero di pagine13
RivistaResearch in Nondestructive Evaluation
Volume16
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

  • Materials Science (miscellaneous)
  • ???subjectarea.asjc.2500.2500???
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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