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Publication Detail
FATIGUE CRACK GROWTH MONITORING USING RAYLEIGH-LIKE WAVES
  • Publication Type:
    Conference
  • Authors:
    Masserey B, Fromme P
  • Publisher:
    AMER INST PHYSICS
  • Publication date:
    2010
  • Pagination:
    1646, 1653
  • Published proceedings:
    REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 29A AND 29B
  • Volume:
    1211
  • Editors:
    Thompson DO,Chimenti DE
  • ISBN-13:
    978-0-7354-0748-0
  • Name of conference:
    36th Annual Review of Progress in Quantitative Nondestructive Evaluation
  • Conference place:
    Univ Rhode Isl, Kingston, RI
  • Conference start date:
    26/07/2009
  • Conference finish date:
    31/07/2009
  • Print ISSN:
    0094-243X
  • Language:
    EN
  • Keywords:
    Crack Detection and Sizing, Fatigue Crack Monitoring, Scattering, Rayleigh Waves, LAMB WAVES, DEFECTS
  • Addresses:
    Masserey, B
    UCL
    Dept Mech Engn
    London
    WC1E 7JE
    England
Abstract
A common problem in aircraft maintenance is the development of fatigue cracks at fasteners due to stress concentration. The use of Rayleigh-like waves for the monitoring of fatigue crack growth at a fastener hole in tensile, aluminum specimens is investigated. Rayleigh-like waves can propagate along the structure and have good sensitivity for the detection of small defects. They are excited in the specimen during fatigue experiments using standard wedge transducers and measured using laser interferometry. Fatigue crack growth during cyclic loading is monitored optically and the changes in the ultrasonic signal caused by crack growth are quantified. The laser measurements show a good sensitivity for the early detection of fatigue damage.
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