비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제37권2호
  • /
  • Pages.91-98
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  • 2017
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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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Study on the Performance of Infrared Thermal Imaging Light Source for Detection of Impact Defects in CFRP Composite Sandwich Panels

  • Park, Hee-Sang (R&D, Korea Research Institute of Smart Material and Structures System Association) ;
  • Choi, Man-Yong (Safety measurement center, Korea research Institute of Standards and Science) ;
  • Kwon, Koo-Ahn (Safety measurement center, Korea research Institute of Standards and Science) ;
  • Park, Jeong-Hak (Safety measurement center, Korea research Institute of Standards and Science) ;
  • Choi, Won-Jae (Safety measurement center, Korea research Institute of Standards and Science) ;
  • Jung, Hyun-Chul (Department of Mechanical Engineering Chosun University)
  • 투고 : 2017.03.15
  • 심사 : 2017.04.26
  • 발행 : 2017.04.30
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초록

Recently, composite materials have been mainly used in the main wings, ailerons, and fuselages of aircraft and rotor blades of helicopters. Composite materials used in rapid moving structures are subject to impact by hail, lightning, and bird strike. Such an impact can destroy fiber tissues in the composite materials as well as deform the composite materials, resulting in various problems such as weakened rigidity of the composite structure and penetration of water into tiny cracks. In this study, experiments were conducted using a 2 kW halogen lamp which is most frequently used as a light source, a 2 kW near-infrared lamp, which is used for heating to a high temperature, and a 6 kW xenon flash lamp which emits a large amount of energy for a moment. CFRP composite sandwich panels using Nomex honeycomb core were used as the specimens. Experiments were carried out under impact damages of 1, 4 and 8 J. It was found that the detection of defects was fast when the xenon flash lamp was used. The detection of damaged regions was excellent when the halogen lamp was used. Furthermore, the near-infrared lamp is an effective technology for showing the surface of a test object.

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참고문헌

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