Design of Polarization-Maintaining FBGs Using Polyimide Films to Improve Strain-Temperature Sensing in CFRP Laminates
Design of Polarization-Maintaining FBGs Using Polyimide Films to Improve Strain-Temperature Sensing in CFRP Laminates
复制标题
DOI：
10.1109/jphot.2021.3063172
复制
发表时间：
2021-04-01
影响因子：
2.4
通讯作者：
Prudenzano, Francesco
中科院分区：
文献类型：
--
作者：
Annunziato, Andrea;Anelli, Francesco;Prudenzano, Francesco
基于保偏光纤的均匀光纤布拉格光栅传感器设计用于同时测量碳纤维增强聚合物层压板的纵向应变和温度。对于每根光纤，采用三种不同的嵌入方法研究熊猫形、领结形和伪矩形光纤形状截面。模拟准确地考虑到纤维嵌入单向碳纤维增强聚合物中并覆盖在两个粘性聚酰亚胺薄膜之间。通过考虑完整的多物理模型，对布拉格波长偏移的机制进行了详尽、准确和稳健的研究，包括：传播模式及其相互作用、双折射、光纤和嵌入复合材料的光机械和热行为。首次提出使用聚酰亚胺薄膜来提高温度传感器的灵敏度，减少复合层压板和传感元件之间由于热膨胀而产生的应力传递。对所设计的光纤布拉格光栅传感器进行了比较，并讨论了它们在同时测量碳纤维增强聚合物应变和温度方面的潜在应用。
Uniform Fiber Bragg Grating sensors based on Polarization-Maintaining fibers are designed for simultaneous longitudinal strain and temperature measurement of Carbon Fiber Reinforced Polymer laminates. Panda, Bow tie and Pseudo-rectangle optical fiber shape sections are investigated employing three different embedding methods, for each optical fiber. The simulation accurately takes into account that the fibers are embedded in unidirectional Carbon Fiber Reinforced Polymer and covered between two adhesive polyimide films. An exhaustive, accurate and robust investigation of the mechanisms originating Bragg wavelength shift is developed by considering a complete multiphysical model including: the propagation modes and their interaction, the birefringence, the optomechanical and thermal behaviour of both the optical fiber and the embedding composite material. For the first time, the use of polyimide films is proposed to obtain an increase of temperature sensor sensitivity, reducing the stress-transfer, due to thermal expansion, between the composite laminate and the sensing element. The designed Fiber Bragg Grating sensors are compared and their potential application, for simultaneous strain and temperature measurement of Carbon Fiber Reinforced Polymer is discussed.