Affiliations: [a] State Key Laboratory for Strength and Vibration of
Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China | [b] School of Information and Communication Engineering,
North University of China, Taiyuan, Shanxi, China
Correspondence:
[*]
Corresponding author: Zhenmao Chen, State Key Laboratory for
Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, 28
West Xianning Road, Xi'an, 710049, Shaanxi, China. Tel./Fax: +86 29 82668736;
E-mail: chenzm@mail.xjtu.edu.cn
Abstract: Lattice sandwich metallic plate (LSMP), a new multifunctional
material with special advanced mechanical behaviours, has potentials to be
applied to many important industries. Defects in welding joints of the LSMP may
significantly reduce the material strength. Eddy Current Testing (ECT) is
considered as a powerful NDT tool for the detection and sizing of defects in
LSMP. The welding zone noises in ECT signals swarm the crack signals and may
reduce the reliability of the quantitative defect evaluation. To overcome this
difficulty, an inversion algorithm based on the strategy of multi-frequency ECT
is proposed in this paper for sizing of welding zone crack. Good consistency of
the reconstruction results is obtained for both simulated and measured ECT
signals, which proves the validity of the proposed scheme.
