Detection of a closed crack by nonlinear acoustics using ultrasonic transducers

Soshu Hirata, Toshihiko Sugiura

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

12 Citations (Scopus)


Recently diffusion joining and friction stir joining have been used for a solid state bonding. They can be affected by impurity of the atmosphere, temperature etc, so a closed crack may arise. This research investigates applicability of a new method by nonlinear acoustics to detection of closed cracks. Numerical analysis and experiment were conducted on a specimen with a closed crack. As a result, higher harmonics appeared in received signals. The longer the crack was, the larger the amplitude of higher harmonics became. These results show a possibility of nondestructive testing by nonlinear acoustics.

Original languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Subtitle of host publicationVolume 25A
Number of pages6
Publication statusPublished - 2006 Mar 6
EventReview of Progress in Quantitative Nondestructive - Brunswick, ME, United States
Duration: 2005 Jul 312005 Aug 5

Publication series

NameAIP Conference Proceedings
Volume820 I
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherReview of Progress in Quantitative Nondestructive
Country/TerritoryUnited States
CityBrunswick, ME


  • Closed crack
  • FEM
  • Nonlinear acoustics
  • UT

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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