비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제32권3호
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  • Pages.269-275
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  • 2012
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  • 1225-7842(pISSN)
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  • 2287-402X(eISSN)
한국비파괴검사학회 (The Korean Society for Nondestructive Testing)
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Acoustic Emission Monitoring of Lightning-Damaged CFRP Laminates during Compression-after-Impact Test

  • Shin, Jae-Ha (Department of Mechanical Engineering, Graduate School, Inha University) ;
  • Kwon, Oh-Yang (Department of Mechanical Engineering, Inha University)
  • 투고 : 2012.04.13
  • 심사 : 2012.06.15
  • 발행 : 2012.06.30
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초록

Carbon-fiber reinforced plastic(CFRP) laminates made of nano-particle-coated carbon fibers and damaged by a simulated lightning strike were tested under compression-after-impact(CAI) mode, during which the damage progress due to compressive loading has been monitored by acoustic emission(AE). The impact damage was induced not by mechanical loading but by a simulated lightning strike. Conductive nano-particles were coated directly on the fibers, from which CFRP coupons were made. The coupon were subjected to the strikes with a high voltage/current impulse of 10~40 kA within a few ${\mu}s$. The effects of nano-particle coating and the degree of damage induced by the simulated lightning strikes on AE activities were examined, and the relationship between the compressive residual strength and AE behavior has been evaluated in terms of AE event counts and the onset of AE activity with the compressive loading. The degree of impact damage was also measured in terms of damage area by using ultrasonic C-scan images. The assessment during the CAI tests of damaged CFRP showed that AE monitoring appeared to be useful to differentiate the degree of damage hence the mechanical integrity of composite structures damaged by lightning strikes.

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참고문헌

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피인용 문헌

  1. Application of Acoustic Emission Technique and Friction Welding for Excavator Hose Nipple vol.33, pp.5, 2013, https://doi.org/10.7779/JKSNT.2013.33.5.436
  2. Monitoring of compression-after-impact testing of CFRP laminates subjected to simulated lightning damage by acoustic emission vol.18, pp.sup1, 2014, https://doi.org/10.1179/1432891713Z.000000000354