Development of smart composite structures with small-diameter fiber Bragg grating sensors for damage detection: Quantitative evaluation of delamination length in CFRP laminates using Lamb wave sensing
Development of smart composite structures with small-diameter fiber Bragg grating sensors for damage detection: Quantitative evaluation of delamination length in CFRP laminates using Lamb wave sensing
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DOI：
10.1016/j.compscitech.2005.07.014
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发表时间：
2005-12-01
影响因子：
9.1
通讯作者：
Ogisu, T
中科院分区：
文献类型：
--
作者：
Takeda, N;Okabe, Y;Ogisu, T
作者和日立电缆有限公司最近开发了小直径光纤及其光纤布拉格光栅（FBG）传感器，用于嵌入复合材料层压板内而不降低强度。包层和聚酰亚胺涂层的外径分别为40和52 μ m。首先，简要总结了小直径光纤光栅传感器在复合材料结构损伤监测中的应用。然后，我们提出了一种新的损伤检测系统，定量评估分层长度的CFRP层压板使用兰姆波传感。在该系统中，压电陶瓷致动器在CFRP层压板中产生Lamb波。在波在层压板中传播之后，使用新开发的高速光波长询问系统，通过附接在层压板上或嵌入在层压板中的FBG传感器接收透射波。将该系统应用于CFRP正交层合板的分层损伤检测。当兰姆波通过脱层时，振幅减小，出现新的波型。这些现象可以很好地模拟使用有限元分析。通过对分层长度对新模式的振幅比和到达时间的影响，发现该系统可以定量地评估分层长度。此外，小直径光纤光栅传感器被嵌入到一个双搭接型试样，剥离过程中可以使用小波变换进行评估。(c)2005年由Elsevier Ltd.出版
The authors and Hitachi Cable, Ltd. have recently developed small-diameter optical fiber and its fiber Bragg grating (FBG) sensor for embedment inside a lamina of composite laminates without strength reduction. The outside diameters of the cladding and polyimide coating are 40 and 52 mu m, respectively. First, a brief summary is presented for applications of small-diameter FBG sensors to damage monitoring in composite structures. Then, we propose a new damage detection system for quantitative evaluation of delamination length in CFRP laminates using Lamb wave sensing. In this system, a piezo-ceramic actuator generates Lamb waves in a CFRP laminate. After the waves propagate in the laminate, transmitted waves are received by an FBG sensor attached on or embedded in the laminate using a newly developed high-speed optical wavelength interrogation system. This system was applied to detect interiaminar delamination in CFRP cross-ply laminates. When the Lamb waves passed through the delamination, the amplitude decreased and a new wave mode appeared. These phenomena could be well simulated using a finite element analysis. From the changes in the amplitude ratio and the arrival time of the new mode depending on the delamination length, it was found that this system could evaluate the delamination length quantitatively. Furthermore, small-diameter FBG sensors were embedded in a double-lap type coupon specimen, and the debonding progress could be evaluated using the wavelet transform. (c) 2005 Published by Elsevier Ltd.