Visualization of delaminations in composite structures using a baseline-free, sparse array imaging technique based on nonlinear Lamb wave propagation

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Tabatabaeipour, Seyed Morteza and Hettler, Jan and Delrue, Steven and Van Den Abeele, Koen (2017) Visualization of delaminations in composite structures using a baseline-free, sparse array imaging technique based on nonlinear Lamb wave propagation. Acta Acustica United with Acustica, 103 (6). pp. 987-997. ISSN 1861-9959 (https://doi.org/10.3813/AAA.919128)

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Abstract

Environmental factors such as temperature and humidity influence the efficacy of defect imaging procedures based on the identification of changes between an intact state and the current state of a sample/component/structure in the presence of a defect. In this paper, we focus on the Reconstruction Algorithm for Probabilistic Inspection of Damage (RAPID) and propose a nonlinear Lamb wave version of RAPID to visualize a delamination in a composite structure without having to know anything about the intact state, i.e. a baseline free RAPID. Once the optimal frequency selection of Lamb waves in a pitch-catch configuration mode is performed, low and high excitation amplitude signal responses within a sparse array at that frequency are evaluated along each transducer-receiver path by analyzing a set of damage sensitive parameters: the correlation coefficient, the energy of the scaling subtracted signal, and the and the third harmonic ratio. Processing of this information leads to a corresponding probabilistic damage map of the area within the sparse array. The obtained results from a validation experiment demonstrate the capability of this nonlinear variant of RAPID for the identification of a delamination in a composite structure

  • Item type:Article
    ID code:84598
    Dates:
    Date
    Event
    1 November 2017
    Published
    27 September 2017
    Accepted
    Notes:Tabatabaeipour, Morteza & Hettler, Jan & Delrue, Steven & Van Den Abeele, Koen. (2017). Visualization of Delaminations in Composite Structures Using a Baseline-Free, Sparse Array Imaging Technique Based on Nonlinear Lamb Wave Propagation. Acta Acustica united with Acustica. 103. 987-997. 10.3813/AAA.919128.
    Subjects:Science > Physics
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:09 Mar 2023 08:53
    Last modified:16 Dec 2024 02:40
    URI:https://strathprints.strath.ac.uk/id/eprint/84598
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