Quantitative comparison between reflection mode and transmission modes for the inspection of composite materials using pulsed thermography

M. Alhammad; N. P. Avdelidis; C. Ibarra-Castanedo; M. E. Torbali; A. Zolotas; X. P. V. Maldague

doi:10.1117/12.2665274

12 June 2023 Quantitative comparison between reflection mode and transmission modes for the inspection of composite materials using pulsed thermography

M. Alhammad, N. P. Avdelidis, C. Ibarra-Castanedo, M. E. Torbali, A. Zolotas, X. P. V. Maldague

Author Affiliations +

Proceedings Volume 12536, Thermosense: Thermal Infrared Applications XLV; 125360J (2023) https://doi.org/10.1117/12.2665274
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Composite materials have extensively been used in the aerospace industry. There are several inspection methods to ensure the safety of these composites; pulse thermography (PT) is one of the most promising ones. Both reflection and transmission modes of PT could be applied. However, few studies reveal the advantages and disadvantages of these two modes. This paper presents a quantitative comparison of pulsed thermal imaging in two modes of reflection and gradual heat transfer in carbon fibres. Experimental work was conducted on carbon fibre-reinforced plastic (CFRP) samples with different thicknesses and thermal images were recorded in both modes. Thermal images were further processed using statistical analysis and machine learning algorithms. Comparing the results from both modes, there is a marked improvement in the accuracy when the reflection mode is employed.

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M. Alhammad, N. P. Avdelidis, C. Ibarra-Castanedo, M. E. Torbali, A. Zolotas, and X. P. V. Maldague "Quantitative comparison between reflection mode and transmission modes for the inspection of composite materials using pulsed thermography", Proc. SPIE 12536, Thermosense: Thermal Infrared Applications XLV, 125360J (12 June 2023); https://doi.org/10.1117/12.2665274

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