A multi-frequency strategy for reconstruction of deep stress corrosion cracks from ECT signals at multiple liftoffs

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II

Article type: Research Article

Authors: Wang, Li^a | Chen, Zhenmao^{a; *}

Affiliations: [a] MOE Key Laboratory for Strength and Vibration, Xi'an Jiaotong University, 28 West Xianning Road, Xi'an, 710049, China

Correspondence: [*] Corresponding author: Zhenmao Chen, Tel.: +86 2982668736; E-mail: chenzm@mail.xjtu.edu.cn

Abstract: In this paper, a layering analysis scheme for reconstruction of deep Stress Corrosion Cracks (SCC) from ECT signals is proposed based on a strategy of multiple frequency excitation and multiple liftoff in order to improve the sizing accuracy. The shape profiles and conductivity of the crack are reconstructed respectively using a hybrid inversion scheme. The profiles of several cracks are reconstructed from simulated signals of conductive notches and measured signals of an artificial SCC. It is demonstrated that the new strategy is promising for the improvement of the sizing precision of SCC.

Keywords: SCC, ECT inversion, multiple frequency and liftoff strategy, crack reconstruction, layering analysis

DOI: 10.3233/JAE-2010-1215

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1017-1023, 2010