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Non-destructive evaluation of localised heat damage occurring in carbon composites using thermography and thermal diffusivity measurement

Addepalli, S., Zhao, Y., Roy, R. ORCID: 0000-0001-5491-7437, Galhenege, W., Colle, M., Yu, J. and Ucur, A. (2019). Non-destructive evaluation of localised heat damage occurring in carbon composites using thermography and thermal diffusivity measurement. Measurement, 131, pp. 706-713. doi: 10.1016/j.measurement.2018.09.040

Abstract

Carbon fibre reinforced polymer (CFRP) composites are now a common occurrence in the aerospace sector especially with their introduction into the aero-engine. With their ever-increasing use in harsh and extreme environments, it is important to understand their behaviour and performance when exposed to such working conditions. This paper presents a novel approach to understand the thermal degradation mechanism of CFRP composites based on the measurement of thermal diffusivity through non-destructive testing (NDT) when exposed to heat in a localised area. The study explored the suitability of pulsed thermography in detecting the physical damage caused due to localised heat exposure together with its ability to identify chemical change that occurs during the initial stages of exposure. The results showed the ability of thermography in detecting discolouration damage through the use of diffusivity measurements acquired by reconstructing the thermography dataset.

Publication Type: Article
Additional Information: © 2018 The Authors. Published by Elsevier Ltd.This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Publisher Keywords: Carbon composites, Non-destructive testing, Thermography
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering
URI: http://openaccess.city.ac.uk/id/eprint/22141
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