Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

The Prediction of Fatigue Damage for Pressure Vessel Materials using SH Ultrasonic Wave

압력용기 고온 고압부의 피로손상 예측을 위한 SH 초음파 평가 기법 개발

  • 강용호 (두산중공업(주) 기술연구원) ;
  • 정용근 (두산중공업(주) 기술연구원) ;
  • 박종진 (두산중공업(주) 기술연구원) ;
  • 박익민 (부산대학교 금속공학과)
  • Published : 2003.04.23
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Abstract

Ultrasonic method using SH(shear horizontal) wave has been developed to determine the surface damage in fatigued material. Fatigue damages based on propagation energy were analyzed by multiregression analysis and phase measurement in interrupted fatigue test specimen including CrMoV and 12Cr alloy steel. From the test results, as the fatigue damage increased the propagation time of the launched waves increased and amplitude of wavelet decreased. Also, analysis for the waveform modulation showed a reliable estimation, with confidence limit of 97% for 12Cr steel and 95% for CrMoV steel, respectively. Therefore, It is thought that SH ultrasonic wave technique can be applied to determine fatigue damage of in-service component nondestructively.

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