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Quantitative tomographic visualization for irregular shape defects by guided wave long range inspection

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Abstract

Ultrasonic guided waves have been proven as a promising tool for structure health monitoring due to their capability of interrogating a large structure from a single transducer position. This study presents the guided wave tomographic imaging in structural health monitoring for detecting cracks and visualization by reconstruction algorithm for the probabilistic inspection of damage. The variable shape factor is suggested for quantitative defect shape and sizing by reconstruction image. The defect of irregular boundary imaging with variable shape factor is precisely reconstructed by advanced RAPID algorithm with limited number of transducers. The particular application of interest is defect imaging of symmetric wave modes with irregular shape defect in plate-like structures. A preliminary study of tomographic imaging by guided waves in a plate-like structure provides guidelines for the quantitative defect imaging.

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Authors and Affiliations

  1. School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, South Korea

    Jaesun Lee & Younho Cho

  2. Nuclear Power Plant Mechanical Engineering Team, Hanbit Nuclear Power Plant, Korea Hydro and Nuclear Power Co. LTD, Yonggwang-gun, Jeonnam, 513-882, South Korea

    Bongjae Sheen

Authors
  1. Jaesun Lee
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  2. Bongjae Sheen
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  3. Younho Cho
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Correspondence to Younho Cho.

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Lee, J., Sheen, B. & Cho, Y. Quantitative tomographic visualization for irregular shape defects by guided wave long range inspection. Int. J. Precis. Eng. Manuf. 16, 1949–1954 (2015). https://doi.org/10.1007/s12541-015-0253-4

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  • DOI: https://doi.org/10.1007/s12541-015-0253-4

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