抄録
Novel CFRTPs (carbon fiber reinforced thermoplastics) for mass production automobile have been developed in Japanese METI-NEDO project (2008–2012 fy). These CFRTPs show not only high mechanical properties, high cycle moldability, high recyclability, but also excellent energy absorption capacity. This ductility is caused because these CFRTPs are difficult to delaminate. Hence, in this paper, how this characteristic works against lightning strike is investigated. We use CMT (carbon fiber mat reinforced thermoplastics) and examine the basic fracture behavior under artificial lightning strike by using impulse current generator. The fracture behavior is observed by high-speed camera and the waveform of lightning is measured by Rogowski coil. Moreover, the damages to the CMT specimens are observed visually by video-microscope and X-ray imaging. The test results showed that the damages of CMT under lightning strike are divided into three areas, named as fiber burned area, resin melted area, and heat affected zone. The sizes of these damage areas showed strong correlation with joule heat generated by the impulse current generator. In addition, it is confirmed that delamination did not occur against lightning strike. Therefore, the resistance to delamination of CFRTP is superior to CF/EP (carbon fiber reinforced epoxy) from the viewpoint of structural integrity after lightning strike.
