Non-destructive evaluation of localised heat damage occurring in carbon composites using thermography and thermal diffusivity measurement
Non-destructive evaluation of localised heat damage occurring in carbon composites using thermography and thermal diffusivity measurement
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DOI：
10.1016/j.measurement.2018.09.040
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发表时间：
2019-01-01
期刊：
影响因子：
5.6
通讯作者：
Ucur, Aziz
中科院分区：
文献类型：
--
作者：
Addepalli, Sri;Zhao, Yifan;Ucur, Aziz
碳纤维增强聚合物（CFRP）复合材料现在在航空航天领域很常见，特别是在航空发动机中。随着它们在恶劣和极端环境中的使用越来越多，了解它们在暴露于此类工作条件时的行为和性能非常重要。本文提出了一种新的方法来了解CFRP复合材料的热降解机制的基础上，通过非破坏性测试（NDT）的热扩散率的测量时，暴露在一个局部区域的热量。该研究探讨了脉冲热成像技术在检测局部热暴露引起的物理损伤方面的适用性，以及其识别暴露初始阶段发生的化学变化的能力。结果表明，通过使用重建的热成像数据集获得的扩散率测量的热成像在检测变色损伤的能力。(C)2018作者由爱思唯尔有限公司发布
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. (C) 2018 The Authors. Published by Elsevier Ltd.