Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)
- Volume 10 Issue 1
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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)
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
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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