A Study on the characteristics of the Signals of AE according to Fracture mode of CFRP under Tensile load

탄소섬유강화플라스틱(CFRP)의 인장하중하에서의 파괴거동에 따른 음향방출신호 특성에 관한 연구

  • 이경원 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 이상윤 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 남준영 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 이종오 (한국기계연구원 부설 재료연구소) ;
  • 이상율 (한국항공대학교 항공재료공학과) ;
  • 이보영 (한국항공대학교 항공우주 및 기계공학부)
  • Received : 2010.11.20
  • Accepted : 2010.12.27
  • Published : 2010.12.31

Abstract

Recently, aerospace structures have lightweight trend in order to reduce the cost of fuel and system, Carbon Fiber Reinforced Plastic (CFRP) can give the ability to reduce weight at 20~50% as the substitution of metal alloy, and there are advantages such as high Non-rigid, specific strength and anti-corrosion, but it is difficult to prove its destruction properties due to heterogeneous structure and anisotropy. In this study we designed specimen, inducing distinguishing destructions of material (for example, matrix crack, fiber breakage, and delamination) by using the Carbon Fiber Reinforced Plastic (CFRP) which is used in a real aircraft, to apply acoustic emission technique to aerospace structures. And we gained data via tensile testing and acoustic emission technique, from which each fault signal was classified respectively by using AE parameters and waveform.

Keywords

References

  1. Malick, P. K., 1988, Fiber-Reinforced Composites, Marcel Decker, Incc., pp. 3-4
  2. A. Barchan, "Analysis of damage mechanics of unidirectional composites beams with acoustic emission method", Ultragarsas journal, Nr.4(61). 2006
  3. X. Lu, W. Sachse and I. Grabec, "Use of an automatic modeler and a small receiver array for acoustic emission (AE) source location", Ultrasonics, Vol. 36, No. 5, pp. 539-547, (1998) https://doi.org/10.1016/S0041-624X(97)00099-1
  4. Joung-Hwi Yoon, Sung-Oan Park, Zhang-Kyu Rhee, and Chang-Ki Woo "A Study on the Fracture Characteristics of CFRP by Acoustic Emission(1)" 한국공작기계학회 추계학술대회 논문집, pp. 283-288
  5. Fang Ming Zhao, Tomonaga Okabe, Nobuo Takeda 2000, "The estimation of statistical fiber strength by fragmentation tests of single-fiber composites", Composites Science and Technology 60(2000) 1965-1974 https://doi.org/10.1016/S0266-3538(00)00084-1
  6. M. Sergeon, E. Vanswijgenhoven, m. Wevers, O. Van Der Biest, "Acoustic Emission during Tensile Testing of SiC fibre reinforced BMAS glass ceramic composites", Composites Part A, Vol.28, no.5, pp.473-480 (1997) https://doi.org/10.1016/S1359-835X(96)00147-9
  7. Ziola SM, Gorman MR. Source location in thin plates using cross-correlation. J Acoust Soc Am 1991;90:2551–6. https://doi.org/10.1121/1.402348
  8. 정희돈, 권영각, 장래웅, 용접부검사방법으로서의 Acoustic Emission, 대한용접학회지, 11-2,(1993) pp. 1-2
  9. Sae-Kyoo Oh, Jung-Hwan Oh, Tae-Eun Jeon, Kyung-Kyoon and Myung-Suk Oh, "Real-Time Evaluation of Friction Weld Quality of Small-Type Hydraulic Valve Spool by Acoustic Emission", 대한 용접,접합학회지 제 12권 2호(1994), pp.97-107