Journal Published Online: 12 January 2018
Volume 46, Issue 2

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

CODEN: JTEVAB

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, China
Cai, Wenlu
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an, China
Chen, Zhenmao
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an, China
Pages: 6
Price: $25.00
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Details
Stock #: JTE20170092
ISSN: 0090-3973
DOI: 10.1520/JTE20170092