Four channels Acoustic Emission (AE) monitoring was conducted for both the ambient and cryogenic tests of unlined filament-wound (FW) CFRP tank. We first evaluated soundness of the tank by using traditional AE parameter analysis. Kaiser effect was obtained at an ambient test. Felicity ratio calculated from AE-onset stress and the maximum previous stress indicated that the pressure was close to a critical pressure to cause damage. Sudden energy increases points which probably indicate large damage occurrence were also observed several times at the ambient test. Several leak points were found in repaired area by snoop test conducted after the ambient test. After the ambient test, we conducted cryogenic test. In the fill-process, boiling and droplet-impacting of LN2 made difficult to monitor fracture induced AE signals. In the pressurization process, serious leakage from the repaired area occurred at 2.0MPa. High energy AE signals were observed three times before pressure reached 2.0MPa. Several new leak points were found in the repaired area and doom parts. Only one leak point was found near the monitoring area on a wrinkle. Waveform based detailed source location near the leak point was conducted after the test. Source locations of 7 AE events are obtained from the area where leakage was found.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Acoustic emission monitoring of CFRP tank at ambient and cryogenic temperature


    Beteiligte:
    Mizutani, Y. (Autor:in) / Morino, Y. (Autor:in) / Hiromu, T. (Autor:in)


    Erscheinungsdatum :

    2003


    Format / Umfang :

    10 Seiten, 15 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Acoustic Emission Monitoring of CFRP Tank at Ambient and Cryogenic Temperature

    Mizutani, Yoshihiro / Morino, Yoshiki / Takahashi, Hiromu | AIAA | 2003


    Acoustic Emission Monitoring of CFRP Tank at Ambient and Cryogenic Temperature

    Mizutani, Y. / Morino, Y. / Takahashi, H. et al. | British Library Conference Proceedings | 2003


    Pressurizing test of CFRP model tank in cryogenic temperature

    Morimoto, T. / Shimoda, T. / Morino, Y. et al. | AIAA | 2001


    CFRP material characterization testing for the RLV cryogenic propellant tank

    Morino, Yoshiki / Ishikawa, Takashi / Aoki, Takahira et al. | AIAA | 1999


    Study of CFRP Application to Cryogenic Fuel Tank for RLV

    Shimoda, T. / He, J. / Morino, Y. et al. | British Library Conference Proceedings | 2002