THERMAL SCIENCE

International Scientific Journal

Qing-Ju Tang

,

Ze-Shen Qu

,

Gui-Peng Xu

,

Xin-Jie Tan

EXPERIMENTAL STUDY ON DEFECTS DETECTION IN GFRP LAMINATES USING LOCK-IN INFRARED THERMOGRAPHY TECHNOLOGY

ABSTRACT
To detect the debonding defect of glass fiber reinforced polymer (GFRP) laminate, the lock-in infrared thermography non-destructive testing system is built and the systematic testing research are conducted, and the effect of different geometrical parameters of debonding defects on the testing results are analyzed. Algorithms such as inter frame differential-multi frame cumulative average method, polynomial fitting-correlation coefficient method, and time-difference contrast method are used to process the image sequence, and signal-to-noise ratio and information en-tropy are defined as the parameters for evaluating the performance of algorithms.
KEYWORDS
Glass fiber reinforced polymer laminate, infrared thermography, image sequence, signal-to-noise ratio, information entropy
PAPER SUBMITTED: 2023-06-11
PAPER REVISED: 2023-08-19
PAPER ACCEPTED: 2023-11-10
PUBLISHED ONLINE: 2024-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI230611041T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [1169 - 1174]
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Experimental study on defects detection in GFRP laminates using lock-in infrared thermography technology

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence