Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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A Study on Comparison of Acoustic Emission, Ultrasonic Testing and Crack Gauge Method in 3-point Bending Testing

3점 굽힘시험에 있어서 AE, 초음파, 크랙게이지법의 비교연구

  • 한응교 (한양대학교 정밀기계공학과) ;
  • 김경석 (조선대학교 기계공학과) ;
  • 박준서 (한양대학교 정밀기계공학과)
  • Published : 1990.05.30
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Abstract

Comparison of acoustic emission, ultrasonic testing and crack gauge in 3-point bending testing have been studied. As the results, COD is indirectly assumed by strain gauge rate and grid pitch width when crack gauge grid is out. Acoustic emission is qualitatively able to measure crack growth by total count but ultrasonic testing has a difficulty in measuring it because of echo height fluctuation according to the change and pressure of UT. probe.

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