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    Volume 49, Issue 6 (February 2021)

    A Comparative Analysis of Carbon Fiber–Reinforced Polymers Subjected to Lightning Damage Tests with Conical Electrodes and Jet Diverting Electrodes

    (Received 5 September 2019; accepted 6 October 2020)

    Published Online: 02 February 2021

    CODEN: JTEVAB

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    Abstract

    The results in the damage testing of carbon fiber–reinforced polymers (CFRPs) subjected to simulated lightning strikes are affected by the type of discharge electrodes employed in the laboratory. In this work, two kinds of discharge electrodes, a conical electrode and a jet diverting electrode, were discussed for use in the CFRP-lightning strike testing. The CFRP damage responses to different electrodes were characterized and compared in terms of surface damage area, internal delamination, temperature distribution, pressure distribution, high-temperature gas expansion, and residual flexural strength. The electric arc formed by the conical electrode was more concentrated than that under the jet diverting electrode configuration, thereby producing a smaller surface and internal damage area but a deeper damage depth. The residual mechanical properties of CFRPs tested with the conical electrode decreased significantly under lightning strikes. The discharge channel was uncontrollable by utilizing the jet diverting electrode, and the test results were more dispersed than the results under the conical electrode, which was not conducive to the damage analysis or the repetition of testing. Therefore, the conical electrode is recommended in CFRP-lightning damage testing.

    Author Information:

    Chen, Jian
    Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Minhang District, Shanghai

    Li, Zhibao
    Anhui Province Key Laboratory of Aircraft Lightning Protection, Shushan District, Anhui

    Fu, Zhengcai
    Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, Minhang District, Shanghai


    Stock #: JTE20190688

    ISSN:0090-3973

    DOI: 10.1520/JTE20190688

    Author
    Title A Comparative Analysis of Carbon Fiber–Reinforced Polymers Subjected to Lightning Damage Tests with Conical Electrodes and Jet Diverting Electrodes
    Symposium ,
    Committee D30