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Open AccessArticle

Detection of Delamination in Polymer Composites by Digital Image Correlation—Experimental Test

Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
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Polymers 2019, 11(3), 523; https://doi.org/10.3390/polym11030523
Received: 20 February 2019 / Revised: 13 March 2019 / Accepted: 17 March 2019 / Published: 20 March 2019
Fiber-reinforced polymer composite structures are frequently used in industries where personal safety is critical; therefore, it is important to periodically estimate or monitor the condition of high value, load bearing structures. The digital image correlation (DIC) is well known as an effective method to obtain full field surface strains; in this paper, it was used to detect artificial damage inside the structures. Carbon or glass fabric reinforced epoxy specimens were produced and tested. All specimens contained an artificial through-delamination which was created by the insertion of different foils of a mould release agent during production. Tensile and compression tests were done while the camera system collected the images of the deformed surface to be analyzed posteriorly. In most cases the approximate locations of delaminations could be effectively detected from strain maps by the localization of zones showing different strain values than intact zones. View Full-Text
Keywords: delamination; digital image correlation; non-destructive test delamination; digital image correlation; non-destructive test
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Szebényi, G.; Hliva, V. Detection of Delamination in Polymer Composites by Digital Image Correlation—Experimental Test. Polymers 2019, 11, 523.

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