Fiber Orientation Effects On The Fracture Process And Acoustic Emission Characteristics Of Composite Laminates
- Authors
- Woo, Sung-Choong; Jung-Heun Kim; Choi, Nak-Sam
- Issue Date
- Dec-2005
- Publisher
- 한국비파괴검사학회
- Keywords
- composite laminates; acoustic emission with high amplitudes; fiber breakages; characteristic fracture process
- Citation
- 비파괴검사학회지, v.25, no.6, pp.451 - 458
- Indexed
- KCI
- Journal Title
- 비파괴검사학회지
- Volume
- 25
- Number
- 6
- Start Page
- 451
- End Page
- 458
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/46214
- ISSN
- 1225-7842
- Abstract
- The effects of fiber orientation on acoustic emission(AE) characteristics have been studied for various composite laminates. Reflection and transmission optical microscopy were used to investigate the damage zone of specimens. AE signals were classified through short time Fourier transform(STFT) as different types: AE signals with a high intensity and high frequency band were due to fiber fracture, while weak AE signals with a low frequency band were due to matrix cracking and/or interfacial cracking. Characteristic feature in the rate of hit-events having high amplitudes showed a procedure of fiber breakages, which expressed the characteristic fracture processes of notched fiber-reinforced plastics with different fiber orientations. As a consequence, the behavior of fracture in the continuous composite laminates could be monitored through nondestructive evaluation(NDE) using the AE technique.
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Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles
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