Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Acoustic Emission Characteristics during fracture Process of Glass Fiber/Aluminum Hybrid Laminates

유리섬유/알루미늄 혼합 적층판의 파괴과정과 음향방출 특성

  • 우성충 (건국대학교 인공근육연구센터) ;
  • 최낙삼 (한양대학교 기계정보경영공학부)
  • Published : 2005.08.30
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Abstract

Fracture behaviors and acoustic emission (AE) characteristics of single-edge-notched monolithic aluminum plates and glass fiber/aluminum hybrid laminate plates have been investigated under tensile loads. AE signals from monolithic aluminum could be classified into two different types: signals with low frequency band and high frequency band. High frequency signals were detected in the post stage of loading beyond displacement of 0.45mm. For glass fiber/aluminum laminates, AE signals with high amplitude and long duration were additionally confirmed on FFT frequency analysis, which corresponded to macro-crack propagation and/or delamination between A1 and fiber layers. On the basis of the above AE analysis and fracture observation with optical microscopy and ultrasonic T scan, characteristic features of AE associated with fracture processes of single-edge-notched glass fiber/aluminum laminates were elucidated according to different fiber ply orientations.

본 연구에서는 편측노치를 갖는 단일 hi판 및 유리섬유/알루미늄 혼합 적층판에 대해 인장하중하의 파괴거동에 따른 음향방출(AE) 특성을 살펴보았다. 단일 알루미늄의 파괴시에 발생하는 AE신호는 저주파수 대역을 갖는 신호와 고주파수 대역을 갖는 신호의 2가지 형태로 분류될 수 있었다. 고주파수 대역의 AE는 0.45mm 변위 보다 큰 후반부 하중단계에서 주로 검출되었다. 유리섬유/알루미늄 혼합 적층판의 경우에는, 고진폭의 긴 유지시간의 신호가 FFT 주파수 해석에 의거하여 거시적인 균열진전이나 A1층과 섬유층 사이의 층간분리에 해당하는 신호로 추정되었다. 위와 같은 AE신호의 해석결과와 광학현미경 및 초음파 스캔에 의한 파괴관찰에 의거하여 섬유층 배향에 따라 상이한 섬유/알루미늄 적층판의 파괴거동과 관련된 AE특성을 규명하였다.

Keywords

References

  1. International Journal of Mechanical Sciences Inelastic behavior and strength of fiber-metal hybrid composite: GLARE Kawai, M.;Morishita, M.;Tomura, S.;Takumida, K.
  2. Materials Science and Engineering A v.234-236 Fatigue crack initiation in fibre-metal laminate GLARE 2 Yan, Hai;Ren, Rongzhen;Tao, Chunhu;Li, Hongyun https://doi.org/10.1016/S0921-5093(97)00153-6
  3. Composites Science and Technology v.63 Fatigue crack growth prediction in GLARE hybrid laminates Shim, D.J.;Alderliesten, R.C.;Spearing, S.M.;Burianek, D.A. https://doi.org/10.1016/S0266-3538(03)00082-4
  4. Scripta Materialia v.35 no.12 Study on Arall failure behavior under tensile loading Yan, Hai;Tao, Chunhu;Li, Hongyun https://doi.org/10.1016/S1359-6462(96)00322-3
  5. Materials Science & Engineering v.A234-A236 Characteristics of damage and fracture process of carbon fiber reinforced plastic under loading-unloading test by using AE method Kim, S.T.;Lee, Y.T.
  6. 한국복합재료학회지 v.8 no.2 탄소 섬유 강화 복합재료의 반복하중에 의한 손상과 파괴에서의 AE특성 이유태;김상태;권재도;이택순;岸 輝雄;志波 光晴
  7. 한국복합재료학회지 v.8 no.4 탄소섬유 복합 재료의 적층방법에 따른 파괴인성과 AE거동 이상국;김옥균;남기우;오세규
  8. NDT&E International v.25 no.6 Characteristics of acousticemission during the damage process in notched short-fibre-reinforced thermoplastics Choi, N.S.;Takahashi, K.;Hoshino, K. https://doi.org/10.1016/0963-8695(92)90637-V
  9. Journal of Material Science v.33 Characterization of the damage process in short-fibre thermoplastic composites by acoustic emission Choi, N.S.;Takahashi, K. https://doi.org/10.1023/A:1004347623040
  10. Composite Structures v.60 AE characteristic of the damage behavior of TiNi/Al6061 SMA composites Lee, Jin-Kyung https://doi.org/10.1016/S0263-8223(03)00014-X
  11. Composites Science and Technology v.60 Broad-band transient recording and characterization of acoustic emission events in composites laminates Johnson, Mikael;Gudmundson, Peter https://doi.org/10.1016/S0266-3538(00)00148-2
  12. Eng Fracture Mech v.56 Fracture behavior and acoustic emission in bending test on single-fiber composites Ni, Q.Q.; Jinen, E. https://doi.org/10.1016/S0013-7944(97)00001-5
  13. NDT&E International v.33 Wavelet-based AE characterization of composite materials Gang https://doi.org/10.1016/S0963-8695(99)00010-9
  14. 비파괴검사학회지 v.23 유리섬유강화 복합재의 AE특성에 대한 섬유배향 효과 김정현;우성충;최낙삼
  15. Key Engineering Materials v.270-273 Fracture Processes and Acoustic Emission in Continuous Fiber Reinforced Composite Laminates Woo, Sung-Choong;Kim, Jung-Hyun;Choi, Nak-Sam https://doi.org/10.4028/www.scientific.net/KEM.270-273.1827
  16. 대한기계학회논문집 A권 v.29 no.6 유리섬유／알루미늄 혼성 적층판의 인장특성과 파괴인성 평가 우성충;최낙삼 https://doi.org/10.3795/KSME-A.2005.29.6.876