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Publication

Broadband local wavenumber estimation for damage detection and quantification in CFRP components

Book Contribution - Book Chapter Conference Contribution

Local wavenumber estimation (LWE) is traditionally applied to a narrowband full wavefield response of the test specimen. The technique proves promising for damage detection in fiber-reinforced polymer (i.e. composite) structures. How-ever, the narrowband nature of the traditional LWE techniques bring several challenges for application on actual test cases. In this paper, the performance of a novel self-reference broadband version of the LWE technique is investigated. The technique is based on modepass filters in the wavenumber-frequency domain. Compared to the traditional narrowband LWE implementations, the proposed method allows a higher level of automation, removes the need for a priori knowledge on the material and/or defect properties, and results in an improved characterization of defects. The performance is evaluated for an aluminum plate with flat bottom hole defects and for a damaged cross-ply CFRP aircraft panel.
Book: Better CM & NDT : warranty of quality, reliability and safety (ENDT&CM 2021), Proceedings.
Number of pages: 1
Publication year:2021
Accessibility:Open