Proceedings of the Korean Society For Composite Materials Conference (한국복합재료학회:학술대회논문집)

The Korean Society for Composite Materials (한국복합재료학회)
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Cure Monitoring and Nondestructive Evaluation of Carbon Fiber/Epoxy Composites by the Measurements of Electrical Resistance and AE

  • Lee Sang-Il (Smart Measurement group, Korea Research Institute of Standards and Science) ;
  • Yoon Dong-Jin (Smart Measurement group, Korea Research Institute of Standards and Science) ;
  • Park Joung-Man (Dept. of Polymer Science and Engineering, ERI, Gyeongsang National University)
  • Published : 2004.10.01
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Abstract

Cure monitoring and nondestructive characteristics of carbon fiber/epoxy composites were evaluated by the measurements of electrical resistance and acoustic emission (AE). Logarithmic electrical resistivity of the untreated single-carbon fiber composite increased suddenly to infinity when the fiber fracture occurred, whereas that of the electrodeposited composite increased relatively broadly up to infinity. As curing temperature increased. logarithmic electrical resistivity of steel fiber increased. On the other hand, electrical resistance of carbon fiber decreased due to the intrinsic electrical properties based on the band theory. The apparent modulus of the electrodeposited composite was higher than that of the untreated composite due to the improved interfacial shear strength (IFSS).

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