Rotational and linearly scanned eddy current probes based on giant magnetoresistive (GMR) sensors have been developed for detecting buried cracks and flaws emanating from fastener holes. The use of shaped excitation coils, the original positioning and orientation of the magnetic sensors enhance the sensitivity of these probes to buried defects while reducing the influence of fastener holes edge. Corner cracks of 2.5 mm in length were detected in the second layer of a 13 mm thick two-layer structure. Transverse notches of 2 mm in length, 1 mm in height were detected at 4.8 mm depth in a two-layer specimen containing a row of holes using linearly scanned probes.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Deep crack detection around fastener holes in airplane multi-layered structures using GMR-based eddy current probes


    Additional title:

    Risstiefenbestimmung um Bolzenlöcher in Flugzeug-Mehrschichtstrukturen mittels Riesenmagnetowiderstand-Wirbelstromsensoren


    Contributors:
    Dogaru, T. (author) / Smith, C.H. (author) / Schneider, R.W. (author) / Smith, S.T. (author)


    Publication date :

    2004


    Size :

    8 Seiten, 9 Bilder, 4 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Eddy Current Detection of Pitting Corrosion Around Fastener Holes

    Heida, J. H. / Advisory Group for Aerospace Research and Development; Structures and Materials Panel | British Library Conference Proceedings | 1995




    Stochastic crack propagation in fastener holes

    YANG, J. / MANNING, S. / RUDD, J. | AIAA | 1985


    Stochastic crack propagation in fastener holes

    YANG, J. N. / HSI, W. H. / MANNING, S. D. et al. | AIAA | 1985