비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)
- 제10권1호
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- Pages.65-72
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- 1990
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- 1225-7842(pISSN)
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- 2287-402X(eISSN)
3점 굽힘시험에 있어서 AE, 초음파, 크랙게이지법의 비교연구
A Study on Comparison of Acoustic Emission, Ultrasonic Testing and Crack Gauge Method in 3-point Bending Testing
초록
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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