Detection and Evaluation of Core and Face De-bonding in Sandwich Composite Reinforced with Carbon Fibers Using Pulsed Heating Infrared Thermography Method

Document Type : Research Article

Authors

Composite and Nanocomposite Research Laboratory, Faculty of Mechanical Engineering, University of Kashan, Kashan, Iran

Abstract

The de-bonding of core and face is one of the most important defects created in sandwich composite materials during their manufacture and operation. In this study, the pulsed step heating thermography method was used to identify and evaluate core and face de-bonding in carbon fiber reinforced sandwich composites with foam core. For this purpose, the de-bonding defects between the core and the face were implemented in the samples during the manufacturing process. Then, using the pulsed step heating infrared thermography method, the location and number of these defects in the samples were identified. The desired parameters of this method, such as time step and heating rate, were obtained from the finite element modeling. By comparing numerical and experimental thermographic imaging results, the best time to record infrared images is predicted to be one second after the end of heating. Numerical results showed that with increasing thermal power and heating time, the temperature difference between the damaged area and its surroundings increased. Also, the numerical results were in good agreement with the experimental results, which can demonstrate the ability to detect the core and the face de-bonding defect in sandwich composite materials reinforced with carbon fibers and foam core using the pulsed heating thermography method.

Keywords

Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 57, Issue 4
July 2025
Pages 401-416

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