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Modal-based vibrothermography using feature extraction with application to composite materials

Research output: Contribution to journalArticle

Original languageEnglish
Number of pages20
Early online date9 Sep 2019
DateAccepted/In press - 6 Aug 2019
DateE-pub ahead of print (current) - 9 Sep 2019


This research focuses on the development of a damage detection algorithm based on modal testing, vibrothermography, and feature extraction. The theoretical development of mathematical models is presented to illustrate the principles supporting the associated algorithms, through which the importance of the three components contributing to this approach is demonstrated. Experimental tests and analytical simulations have been performed in laboratory conditions to show that the proposed damage detection algorithm is able to detect, locate, and extract the features generated due to the presence of sub-surface damage in aerospace grade composite materials captured by an infrared camera. Through tests and analyses, the reliability and repeatability of this damage detection algorithm are verified. In the concluding observations of this article, suggestions are proposed for this algorithm’s practical applications in an operational environment.

    Structured keywords

  • Bristol Composites Institute ACCIS

    Research areas

  • Structural health monitoring, Damage detection, Infrared thermography, Vibrothermography, Feature extraction, Principal component analysis, Independent component analysis, Modal testing, Finite element analysis, Composite materials

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  • Full-text PDF (author’s accepted manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via SAGE Publications at . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1.68 MB, PDF document


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