Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
권호 표지

AE Signal Characteristic Analysis caused by Crack Growth

균열 진전에 따라 발생되는 AE신호 특성 분석

  • 김원철 (경상대학교 기계시스템공학과) ;
  • 김재구 (경상대학교 대학원) ;
  • 구동식 (경상대학교 대학원) ;
  • 김효중 (경상대학교 대학원) ;
  • 최병근 (경상대학교 에너지기계공학과, 해양산업연구소)
  • Received : 2010.07.13
  • Accepted : 2010.11.05
  • Published : 2010.12.31
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Abstract

Acoustic emission (AE) technique is a well-known non-destructive test technique. Fatigue crack growth test was performed using SM53C to check up the AE signal occurred by crack growth, so AE system was used to detect the crack signal. Features calculated by the AE signals were analyzed to evaluate the steps divided the crack growth into three. The steps, initiation, growth and breaking, were separated by velocity of the crack growth. Time waveform and power spectrum were created by the AE signal of each one of the steps and compared. In the feature domains, it was found that AE values changed rapidly as the velocity of the crack increasing.

Keywords

References

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