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Materials 2016, 9(11), 916;

Lamb-Wave-Based Tomographic Imaging Techniques for Hole-Edge Corrosion Monitoring in Plate Structures

School of Reliability and Systems Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China
Author to whom correspondence should be addressed.
Academic Editor: Jung Ho Je
Received: 15 September 2016 / Revised: 27 October 2016 / Accepted: 7 November 2016 / Published: 12 November 2016
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This study presents a novel monitoring method for hole-edge corrosion damage in plate structures based on Lamb wave tomographic imaging techniques. An experimental procedure with a cross-hole layout using 16 piezoelectric transducers (PZTs) was designed. The A0 mode of the Lamb wave was selected, which is sensitive to thickness-loss damage. The iterative algebraic reconstruction technique (ART) method was used to locate and quantify the corrosion damage at the edge of the hole. Hydrofluoric acid with a concentration of 20% was used to corrode the specimen artificially. To estimate the effectiveness of the proposed method, the real corrosion damage was compared with the predicted corrosion damage based on the tomographic method. The results show that the Lamb-wave-based tomographic method can be used to monitor the hole-edge corrosion damage accurately. View Full-Text
Keywords: health monitoring; lamb wave; tomographic imaging; ART; corrosion health monitoring; lamb wave; tomographic imaging; ART; corrosion

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Wang, D.; Zhang, W.; Wang, X.; Sun, B. Lamb-Wave-Based Tomographic Imaging Techniques for Hole-Edge Corrosion Monitoring in Plate Structures. Materials 2016, 9, 916.

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