Detection of deep-lying defects in carbon fiber composites using SQUID-NDE system cooled by a cryocooler

Y. Hatsukade, T. Inaba, N. Kasai, Y. Maruno, Atsushi Ishiyama, S. Tanaka

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    In this paper, we present our latest progress in the studies on SQUID-NDE for carbon fiber composites (CFCs), including carbon fiber reinforced plastics (CFRPs) and carbon fiber reinforced carbon matrix composites (C/Cs). We have developed a new SQUID-NDE system for the CFCs utilizing a pulse tube cryocooler for more practical and easy-handling use. Electromagnets using U-shaped ferrite cores have been introduced to the system in order to induce enough eddy current density in the relatively low-electric-conductivity CFCs. By using this system, we demonstrated the detection of deep-lying defects in thick and/or multi-layer CFCs specimens, partly including metal layer upon/below CFCs layer. CFRP plates and multi-layer C/C plates with total thickness of 20 mm having deep-lying slots at various depths were prepared. The slots at 15 mm below the surface in the CFRP plate and multi-layer C/C plate were successfully detected. Defect detections on more "real" multi-layer structures, including aluminum plates upon/below C/C plates, were also examined.

    Original languageEnglish
    Pages (from-to)1484-1490
    Number of pages7
    JournalPhysica C: Superconductivity and its Applications
    Volume412-414
    Issue numberSPEC. ISS.
    DOIs
    Publication statusPublished - 2004 Oct

    Fingerprint

    fiber composites
    SQUIDs
    carbon fibers
    Carbon fibers
    carbon fiber reinforced plastics
    Defects
    Carbon fiber reinforced plastics
    defects
    Composite materials
    plastic plates
    slots
    plastic fibers
    Electromagnets
    electromagnets
    Eddy currents
    Aluminum
    eddy currents
    laminates
    Ferrite
    carbon fiber

    Keywords

    • Carbon fiber composites
    • Cryocooler
    • SQUID-NDE
    • Thick and multi-layer structures

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Detection of deep-lying defects in carbon fiber composites using SQUID-NDE system cooled by a cryocooler. / Hatsukade, Y.; Inaba, T.; Kasai, N.; Maruno, Y.; Ishiyama, Atsushi; Tanaka, S.

    In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 1484-1490.

    Research output: Contribution to journalArticle

    Hatsukade, Y. ; Inaba, T. ; Kasai, N. ; Maruno, Y. ; Ishiyama, Atsushi ; Tanaka, S. / Detection of deep-lying defects in carbon fiber composites using SQUID-NDE system cooled by a cryocooler. In: Physica C: Superconductivity and its Applications. 2004 ; Vol. 412-414, No. SPEC. ISS. pp. 1484-1490.
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