유리섬유강화 복합재의 AR특성에 대한 섬유배향 효과
- Title
- 유리섬유강화 복합재의 AR특성에 대한 섬유배향 효과
- Other Titles
- fiber Orientation Effects on the Acoustic Emission Characteristics of Class fiber-Reinforced Composite Materials
- Author
- 최낙삼
- Keywords
- acoustis emission(AE); unidirectional; satin-weave; AE event-rate; AE energy; short time Fourier transform; microscopic examination
- Issue Date
- 2002-10
- Publisher
- 한국비파괴검사학회
- Citation
- 비파괴검사학회지, v. 23, issue. 5, page. 429-438
- Abstract
- The effects of fiber orientation on acoustic emission(AE) characteristics have been studied for the unidirectional and satin-weave, continuous glass-fiber reinforced plastic(UD-GFRP and SW-GFRP) tensile specimens. Reflection and transmission optical microscopy was used for investigation of the damage zone of specimens. AE signals were classified as different types by using short time fourier transform(STFT) : AE signals with high intensity and high frequency band were due to fiber fracture, while weak AE signals with low frequency band were due to matrix and interfacial cracking. The feature in the rate of hit-events having high amplitudes showed a process of fiber breakages, which expressed the characteristic fracture processes of individual fiber-reinforced plastics with different fiber orientations and with different notching directions. As a consequence, the fracture behavior of the continuous GFRP could be monitored as nondestructive evaluation(NDE) through the AE technique.
- URI
- https://www.koreascience.or.kr/article/JAKO200312242697354.pagehttps://repository.hanyang.ac.kr/handle/20.500.11754/157714
- ISSN
- 1225-7842; 2287-402X
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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