Damage identification in a holed CFRP laminate using a chirped fiber Bragg grating sensor
Damage identification in a holed CFRP laminate using a chirped fiber Bragg grating sensor
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DOI：
10.1016/j.compscitech.2006.08.004
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发表时间：
2007-02-01
影响因子：
9.1
通讯作者：
Takeda, N.
中科院分区：
文献类型：
--
作者：
Yashiro, S.;Okabe, T.;Takeda, N.
提出了一种利用内嵌啁啾光纤光栅（FBG）传感器对开孔CFRP正交层板进行损伤识别的方法。我们研究了啁啾光纤光栅传感器的反射光谱的变化，由于附近的孔损伤。进一步研究了啁啾光纤光栅传感器的反射谱，根据反射谱的形状，将应变沿应变计截面沿着的分布反演为反问题。实验证实，当每种损伤（横向裂纹或分层）发生和扩展时，啁啾光纤光栅传感器的反射光谱在一定波长范围内发生明显变化。局部应变变化估计啁啾FBG传感器的反射光谱，其位置与所观察到的横向裂纹。我们还证明了损伤识别的穿孔标本，并得出结论，啁啾光纤光栅传感器的这一功能提供了成功的识别孔附近的损伤模式。(c)2006爱思唯尔有限公司版权所有。
This study proposes damage identification for holed CFRP cross-ply laminates using an embedded chirped fiber Bragg grating (FBG) sensor. We investigated changes in the reflection spectrum of the chirped FBG sensor due to damage near the hole. The reflection spectrum of the chirped FBG sensor was further studied by estimating the strain distribution along the gage section as an inverse problem based on the spectrum shape. We experimentally confirmed that the reflection spectrum of the chirped FBG sensor changed distinctively within certain wavelengths when each type of damage (transverse cracks or delamination) occurred and extended. Local strain changes were estimated from the reflection spectrum of the chirped FBG senso; their locations coincided with those for the observed transverse cracks. We also demonstrate damage identification for the holed specimen and conclude that this feature of the chirped FBG sensor provides successful identification of a damage pattern near the hole. (c) 2006 Elsevier Ltd. All rights reserved.