동력기계공학회지 (Journal of Power System Engineering)

  • 제14권6호
  • /
  • Pages.41-46
  • /
  • 2010
  • /
  • 2713-8429(pISSN)
  • /
  • 2713-8437(eISSN)
한국동력기계공학회 (The Korean Society for Power System Engineering)
권호 표지

균열 진전에 따라 발생되는 AE신호 특성 분석

AE Signal Characteristic Analysis caused by Crack Growth

  • 김원철 (경상대학교 기계시스템공학과) ;
  • 김재구 (경상대학교 대학원) ;
  • 구동식 (경상대학교 대학원) ;
  • 김효중 (경상대학교 대학원) ;
  • 최병근 (경상대학교 에너지기계공학과, 해양산업연구소)
  • 투고 : 2010.07.13
  • 심사 : 2010.11.05
  • 발행 : 2010.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

  1. K. W. Nam and S. J. Kim, 1998, "Signal Characteristics of Acoustic Emission from Fatigue Crack Propagation", KSME, Proceedings of the KSME Annual Autumn Conference, 53-58
  2. D. J. Yoon, J. C. Jeong, P. Park, K. B. Kim and S. S. Lee, 2000, "Study on the Fatigue Crack Behavior by the Stress Intensity Factor and AE Parameters", Journal of the Korean Society for NDT, Vol. 20, pp. 412.
  3. Y. Ishida, 2008, "Cracked Rotors: Industrial Vibrations of a Cracked Rotor", Journal of Sound and Vibration, Vol. 269, pp. 33-60.
  4. O. S. Jun, 2008, "Analysis of Harmonic Vibration of Cracked Rotor", Mechanical Systems and Signal Processing, Vol. 22, pp. 805-817. https://doi.org/10.1016/j.ymssp.2007.11.005
  5. J. J. Sunou, 2009, "Experimental Response and Vibrational Characteristics of a Slotted Rotor". Common Nonlinear Sci. Numer. Simulate, Vol. 14, pp. 3179-3194. https://doi.org/10.1016/j.cnsns.2008.10.024
  6. C. Cempel, 1991, Vibroacoustic Condition Monitoring, Ellis Horwood, Chichester, UK.
  7. Mikael Johnson and Peter Gudmundson, 2000, "Broad-band Transient Recording and Characterization of Acoustic Emission Events in Composite Laminates", Composites Science and Technology 60, 2803-2818 https://doi.org/10.1016/S0266-3538(00)00148-2
  8. S. K. Lee, J. Y. Do, K. W. Nam, C. Y. Kang and S. H. Ahn, 2000, "Crack Propagation Behavior of 316L Stainless Steel and Frequency Characteristics of its Acoustic Emission", KSPSE, Vol. 4, No. 2, pp. 52-57