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    Volume 46, Issue 2 (January 2018)

    NDT of Cavity Defect in Metallic Plate Using dc Potential Drop Method

    (Received 11 February 2017; accepted 22 August 2017)

    Published Online: 12 January 2018

    CODEN: JTEVAB

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    Abstract

    A zoning testing method is proposed for the nondestructive testing of cavity defects in metallic foam plates based on the principle of dc potential drop testing. The dc is injected from the two ending points of the diagonal line while the inspection signal is measured from the nodal potential of nodes at the midline of the target region. The proposed method is numerically validated in terms of its signal sensitivity to the size and the location of the defect as well as its signal interference–resistant capability to defects located in the surrounding regions. Furthermore, experimental validation is conducted, and the result shows that the proposed zoning testing method is suitable for the detection of cavity defects in practical cases.

    Author Information:

    Wang, Xiaojuan
    Institute of Systems Engineering, China Academy of Engineering and Physics, Mianyang,

    Cai, Wenlu
    State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an,

    Chen, Zhenmao
    State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an,


    Stock #: JTE20170092

    ISSN:0090-3973

    DOI: 10.1520/JTE20170092

    Author
    Title NDT of Cavity Defect in Metallic Plate Using dc Potential Drop Method
    Symposium ,
    Committee E07