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Publication
Enhanced thermographic inspection of woven fabric composites by k-space filtering
Journal Contribution - Journal Article
Infrared thermography is a well-known non-destructive testing technique for detecting defects in unidirectional fiber reinforced polymer laminates. When applied to woven fabric reinforced polymers, however, the weave structure causes strong disturbances and patterns in the background of the thermal images, making accurate and reliable defect assessment a challenging task. In this paper, the concept of k-space filtering is introduced for an improved evaluation of thermographic images obtained from woven fabric composites. An algorithm is intro-duced to automatically decompose a thermographic image into an image which contains the structured thermal background related to the weave pattern, and a residual image representing other features, e.g. defects. The proposed k-space filtering approach is demonstrated on thermographic data from various woven fabric com-posites with different weave patterns and defect scenarios, clearly showing an enhanced performance in terms of defect detection and sizing.
Journal: COMPOSITES PART B-ENGINEERING
ISSN: 1879-1069
Volume: 252
Publication year:2023
Accessibility:Open