Delamination monitoring of laminated composites subjected to low-velocity impact using small-diameter FBG sensors
Delamination monitoring of laminated composites subjected to low-velocity impact using small-diameter FBG sensors
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DOI：
10.1016/j.compositesa.2004.12.005
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发表时间：
2005-01-01
影响因子：
8.7
通讯作者：
Takeda, N
中科院分区：
文献类型：
--
作者：
Takeda, S;Minakuchi, S;Takeda, N
采用小直径光纤布拉格光栅（FBG）传感器对低速冲击下的分层进行监测。将FBG传感器嵌入碳纤维增强塑料（CFRP）层压板[0（4）/90（4）/0（4）]中。使用落锤冲击试验机，在四个冲击能量水平下对层压材料施加冲击载荷。在冲击试验后，通过超声C扫描观察了包括分层在内的内部损伤，并测量了来自嵌入式FBG传感器的反射谱。谱的形式随分层尺寸的变化而敏感。此外，从理论上计算了光谱，以确认测量的光谱。由于实测光谱的变化与计算光谱的变化一致，因此可以明确分层尺寸与光谱形状之间的关系。结果表明，采用小直径光纤光栅传感器的分层监测方法是有效的。(c)2005爱思唯尔有限公司保留所有权利。
Small-diameter fiber Bragg grating (FBG) sensors were applied for the monitoring of delamination induced by low-velocity impact. The FBG sensors were embedded into carbon fiber reinforced plastic (CFRP) laminates [0(4)/90(4)/0(4)]. Using a drop-weight impact tester, an impact loading was applied to the laminates at four impact energy levels. After the impact tests, the internal damages including delaminations were observed by ultrasonic C-scan, and the reflection spectra from the embedded FBG sensors were measured. The form of the spectrum changed sensitively depending on the delamination size. Furthermore, the spectra were calculated theoretically for confirmation of the measured spectra. Since the change in the measured spectrum was consistent with that in the calculated spectrum, the relationship between the delamination size and the form of the spectrum could be clarified. From the results, the present method using small-diameter FBG sensors was found to be effective for the monitoring of the delamination. (c) 2005 Elsevier Ltd. All rights reserved.