비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제36권2호
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  • Pages.130-137
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  • 2016
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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 Defects Detection in Composites by Using Optical Position and Infrared Thermography

  • Kwon, Koo-Ahn (Safety Measurement Center, Korea Research Institute of Standards and Science) ;
  • Park, Hee-Sang (Department of Research & Development, Korea Research Institute of Smart Material and Structures System Association) ;
  • Choi, Man-Yong (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)
  • 투고 : 2016.03.16
  • 심사 : 2016.03.29
  • 발행 : 2016.04.30
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초록

Non-destructive testing methods for composite materials (e.g., carbon fiber-reinforced and glass fiber-reinforced plastic) have been widely used to detect damage in the overall industry. This study detects defects using optical infrared thermography. The transient heat transport in a solid body is characterized by two dynamic quantities, namely, thermal diffusivity and thermal effusivity. The first quantity describes the speed with thermal energy diffuses through a material, whereas the second one represents a type of thermal inertia. The defect detection rate is increased by utilizing a lock-in method and performing a comparison of the defect detection rates. The comparison is conducted by dividing the irradiation method into reflection and transmission methods and the irradiation time into 50 mHz and 100 mHz. The experimental results show that detecting defects at 50 mHz is easy using the transmission method. This result implies that low-frequency thermal waves penetrate a material deeper than the high-frequency waves.

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참고문헌

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피인용 문헌

  1. Quantitative evaluation of compactness of concrete-filled fiber-reinforced polymer tubes using piezoceramic transducers and time difference of arrival vol.27, pp.3, 2018, https://doi.org/10.1088/1361-665X/aa9dd0