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Open AccessArticle

Algorithm Development for the Non-Destructive Testing of Structural Damage

1
Centre for Infrastructure Engineering (CIE), Western Sydney University, Kingswood, NSW 2747, Australia
2
School of Computing, Engineering and Mathematics, Western Sydney University, Kingswood, NSW 2747, Australia
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(14), 2810; https://doi.org/10.3390/app9142810
Received: 21 May 2019 / Revised: 24 June 2019 / Accepted: 1 July 2019 / Published: 13 July 2019
(This article belongs to the Section Civil Engineering)
Monitoring of structures to identify types of damages that occur under loading is essential in practical applications of civil infrastructure. In this paper, we detect and visualize damage based on several non-destructive testing (NDT) methods. A machine learning (ML) approach based on the Support Vector Machine (SVM) method is developed to prevent misdirection of the event interpretation of what is happening in the material. The objective is to identify cracks in the early stages, to reduce the risk of failure in structures. Theoretical and experimental analyses are derived by computing the performance indicators on the smart aggregate (SA)-based sensor data for concrete and reinforced-concrete (RC) beams. Validity assessment of the proposed indices was addressed through a comparative analysis with traditional SVM. The developed ML algorithms are shown to recognize cracks with a higher accuracy than the traditional SVM. Additionally, we propose different algorithms for microwave- or millimeter-wave imaging of steel plates, composite materials, and metal plates, to identify and visualize cracks. The proposed algorithm for steel plates is based on the gradient magnitude in four directions of an image, and is followed by the edge detection technique. Three algorithms were proposed for each of composite materials and metal plates, and are based on 2D fast Fourier transform (FFT) and hybrid fuzzy c-mean techniques, respectively. The proposed algorithms were able to recognize and visualize the cracking incurred in the structure more efficiently than the traditional techniques. The reported results are expected to be beneficial for NDT-based applications, particularly in civil engineering. View Full-Text
Keywords: non-destructive testing; machine learning; artificial intelligence; image processing; microwave or millimeter wave imaging; structural damage non-destructive testing; machine learning; artificial intelligence; image processing; microwave or millimeter wave imaging; structural damage
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Noori Hoshyar, A.; Rashidi, M.; Liyanapathirana, R.; Samali, B. Algorithm Development for the Non-Destructive Testing of Structural Damage. Appl. Sci. 2019, 9, 2810.

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