Detection of internal cracks and delamination in carbon-fiber-reinforced plastics using SQUID-NDI system

Y. Hatsukade, N. Kasai, M. Kurosawa, R. Kawai, H. Takashima, F. Kojima, Atsushi Ishiyama

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Recently, thick boards of carbon-fiber-reinforced plastic (CFRP) are often used in space crafts and space structures. Nondestructive inspection (NDI) using superconducting quantum interference device (SQUID) is a prospective NDI method for the thick CFRP materials. To estimate the potential of SQUID-NDI for detection of deep-lying defects in CFRP, the skin effect must be clarified. So we applied a SQUID-NDI method to hidden slots and delaminations at various depths in thick CFRP boards to obtain the dependence of the peak amplitude of the magnetic response to the defects on the defect depth. Magnetic field response due to slots of up to 15 mm depth was detected. The response peak amplitude exponentially reduced as the depth increased. We estimated the depth dependence by a simple calculation assuming the same skin effect in CFRP as in metals. The estimated dependence differs a little from the experimental one. The difference suggests that a more accurate calculation is necessary.

    Original languageEnglish
    Pages (from-to)267-270
    Number of pages4
    JournalPhysica C: Superconductivity and its Applications
    Volume372-376
    Issue numberPART 1
    DOIs
    Publication statusPublished - 2002 Aug

    Fingerprint

    carbon fiber reinforced plastics
    SQUIDs
    Carbon fiber reinforced plastics
    Delamination
    inspection
    cracks
    Inspection
    Cracks
    interference
    Skin effect
    slots
    Defects
    defects
    vehicles
    Metals
    carbon fiber reinforced plastic
    Magnetic fields
    estimates
    magnetic fields
    metals

    Keywords

    • Carbon-fiber-reinforced plastics
    • Deep-lying defect
    • Skin effect
    • SQUID-NDI

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Detection of internal cracks and delamination in carbon-fiber-reinforced plastics using SQUID-NDI system. / Hatsukade, Y.; Kasai, N.; Kurosawa, M.; Kawai, R.; Takashima, H.; Kojima, F.; Ishiyama, Atsushi.

    In: Physica C: Superconductivity and its Applications, Vol. 372-376, No. PART 1, 08.2002, p. 267-270.

    Research output: Contribution to journalArticle

    Hatsukade, Y. ; Kasai, N. ; Kurosawa, M. ; Kawai, R. ; Takashima, H. ; Kojima, F. ; Ishiyama, Atsushi. / Detection of internal cracks and delamination in carbon-fiber-reinforced plastics using SQUID-NDI system. In: Physica C: Superconductivity and its Applications. 2002 ; Vol. 372-376, No. PART 1. pp. 267-270.
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