Damage detection in holed composite laminates using an embedded FBG sensor
Damage detection in holed composite laminates using an embedded FBG sensor
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DOI：
10.1016/j.compositesa.2011.12.009
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发表时间：
2012-03
影响因子：
8.7
通讯作者：
T. Okabe;S. Yashiro
中科院分区：
文献类型：
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作者：
T. Okabe;S. Yashiro
本文讨论了在静态和循环载荷下，使用嵌入式光纤布拉格光栅（FBG）传感器检测开孔CFRP层合板的损伤。为了检测层合板中的损伤扩展，使用嵌入式FBG传感器测量频谱形状的变化，并与数值模拟得到的结果进行比较。反射谱的形状在循环载荷试验期间没有变化;但是，由于孔周围的损坏，在静态载荷试验中，反射谱的形状确实随着应变的增加而变化。为了澄清这一差异，对样本横截面的抛光表面进行了分析。在循环载荷测试期间，观察到光纤和基质之间的脱粘。这些结果使我们得出结论，在复合材料层合板中的孔周围的疲劳损伤可能不会被检测到与FBG传感器由于脱粘。
This paper discusses damage detection in a holed CFRP laminate under static and cyclic loading using an embedded fiber Bragg grating (FBG) sensor. In order to detect the damage extension in the laminate, the change in the spectrum shape was measured using an embedded FBG sensor and was compared with that obtained by numerical simulation. The shape of the reflection spectrum did not change during the cyclic load test; however, it did change with increased strain in the static load test, due to damage around the hole. To clarify this difference, the polished surface of the cross section of the specimen was analyzed. Debonding was observed between the optical fiber and matrix during the cyclic load test. These results lead us to conclude that fatigue damage around a hole in a composite laminate may not be detected with an FBG sensor due to the debondings.