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首页> 外文期刊>Composite Structures >Continuous debonding monitoring of a patch repaired helicopter stabilizer: Damage assessment and analysis
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Continuous debonding monitoring of a patch repaired helicopter stabilizer: Damage assessment and analysis

机译：修补补丁直升机稳定器的连续脱胶监控：损坏评估和分析

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The present work focuses on the structural health monitoring of an aluminium vertical helicopter stabiliser with a pre-introduced crack which was repaired with an adhesively bonded composite patch. The structure was monitored under bending fatigue and its performance was evaluated with Lamb waves, lock-in thermography and ultrasonic testing. Outlier analysis of Lamb waves captured the onset and progress of the damage in the form of patch debonding, enabling the identification of five damage-severity regions. Principal component analysis showed distinctive clusters that corresponded to different damage levels while the application of principal curves on the selected features proved to be an additional damage detection index. Amplitude and phase lock-in images accurately captured the onset and evolution of the damage in the form of patch debonding and honeycomb/skin debonding in agreement with the damage indices obtained from Lamb waves. C-scan further validated the damage mechanisms that were captured by the other methods. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本工作着重于对铝制垂直直升机稳定器的结构健康状况进行监控，该稳定器具有预先引入的裂缝，并用粘合的复合补片进行了修复。在弯曲疲劳下监测该结构，并通过兰姆波，锁定热成像和超声测试评估其性能。对Lamb波的离群值分析以贴片剥离的形式捕获了损坏的发生和进展，从而可以识别五个损坏严重程度区域。主成分分析显示出与不同损伤程度相对应的独特簇，而在选定特征上应用主曲线被证明是附加的损伤检测指标。振幅和相位锁定图像以贴片剥离和蜂窝/皮肤剥离的形式准确捕获了损伤的发生和演变，与从兰姆波获得的损伤指数相符。 C扫描进一步验证了其他方法捕获的损坏机制。 （C）2015 Elsevier Ltd.保留所有权利。

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