Reliability and Accuracy of Embedded Fiber Bragg Grating Sensors for Strain Monitoring in Advanced Composite Structures
Reliability and Accuracy of Embedded Fiber Bragg Grating Sensors for Strain Monitoring in Advanced Composite Structures
复制标题
DOI：
10.1007/s12540-014-3020-7
复制
发表时间：
2014-05-01
影响因子：
3.5
通讯作者：
Proli, Paolo
中科院分区：
文献类型：
--
作者：
Di Sante, Raffaella;Donati, Lorenzo;Proli, Paolo
本文研究了光纤布拉格光栅（FBG）传感器在复合材料结构应变监测中的有效、可靠的嵌入和使用问题，特别是在航海领域中，利用真空袋技术在高压灭菌器中制造部件的过程。制备了嵌入fbg的CFRP材料层合板，初步研究了固化工艺参数对光纤透光特性的影响。通过光学时域反射计测量光衰减，测试了两种不同类型的涂层，即聚酰亚胺和丙烯酸酯。随后从薄片中提取拉伸试样，并使用表面安装的传统电应变计（SG）进行测量。在静态拉伸试验中比较FBG和SG测量值，可以评估FBG的应变监测能力，特别是其嵌入时的灵敏度（即测量因子）。
This work investigated issues for an efficient and reliable embedding and use of Fiber Bragg Grating (FBG) sensors for strain monitoring of composite structures with particular regard to the manufacturing process of components in the nautical field by means of the vacuum bag technique in autoclave. CFRP material laminates with embedded FBGs were produced and the effect of the curing process parameters on the light transmission characteristics of the optical fibers was initially investigated. Two different types of coating, namely polyimide and acrylate, were tested by measuring the light attenuation by an Optical Time Domain Reflectometer. Tensile specimens were subsequently extracted from the laminas and instrumented also with a surface-mounted conventional electrical strain gage (SG). Comparison between the FBG and SG measurements during static tensile tests allowed the evaluation of the strain monitoring capability of the FBGs, in particular of their sensitivity (i.e., gage factor) when embedded.