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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >An Experimental and Numerical Study on the Use of Chirped FBG Sensors for Monitoring Fatigue Damage in Hybrid Composite Patch Repairs
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An Experimental and Numerical Study on the Use of Chirped FBG Sensors for Monitoring Fatigue Damage in Hybrid Composite Patch Repairs

机译：啁啾FBG传感器对混合复合贴片修复疲劳损伤使用的实验和数值研究

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摘要

In this paper, chirped fibre Bragg grating (CFBG) sensors used to monitor the structural health of a composite patch used to repair an aluminium panel is presented. To introduce damage, a notch was produced at the centre of an aluminium panel. The repair consisted of bonding a pre-cured composite patch to the host panel using an aerospace-grade film adhesive; the sensor was embedded in the bond-line during fabrication of the repair. The repaired panels were subjected to tension-tension loading in fatigue. Cracks initiated and grew from both ends of the notch in the aluminium panels and the fatigue loading was stopped periodically for short periods of time to record the reflected spectra from the sensor. It was found that perturbations in the reflected spectra began to occur when the crack was within about 2 to 3 mm of the sensor location; after the crack passed the sensor location, the perturbations essentially stabilised. Predicted reflected spectra have been found to be in good agreement with the experiment, confirming that CFBG sensors can detect crack growth in patch-repaired panels.
机译：本文介绍了用于监测用于修复铝板的复合贴片结构健康的啁啾光纤布拉格光栅（CFBG）传感器。为了引入损坏，在铝板的中心产生凹口。修复包括使用航空级胶片粘合剂将预固化的复合贴片粘合到主板上;在制造修复期间，传感器嵌入键合线中。经过修复的面板在疲劳中进行张紧张力载荷。从铝板中的凹口的两端发起并增长的裂缝，并且在短时间内定期停止疲劳负载，以记录来自传感器的反射光谱。发现当裂缝在传感器位置约2到3毫米的裂缝内开始发生反射光谱的扰动;在裂缝通过传感器位置后，扰动基本上稳定。已经发现预测的反射光谱与实验一致，确认CFBG传感器可以检测贴片修复面板中的裂纹生长。

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