基于FBG的复合材料/铝合金胶接固化监测研究
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摘要
在航天结构中,复合材料与金属材料的胶接过程与胶接效果评估对于保障航天器运行安全至关重要,提出了利用分布式光纤光栅传感器对复合材料与铝合金的胶接固化过程进行监测。根据复合材料/铝合金双层结构特点及其固化工艺,分析了胶接固化过程中引起胶层应变变化的相关因素。研究了光纤光栅传感器布局方案及温度补偿措施,给出了胶接固化过程中的光纤光栅温度补偿传感器封装方法。在此基础上,构建了基于光纤光栅传感器的复合材料/铝合金结构胶接固化过程监测系统,实现对胶接固化过程的监测。研究工作对于改进航空航天结构复合材料胶接方法,实现对胶接过程与时效性的在线监测具有重要意义。
In space structure,the bonding process and bonding effect evaluation of composite materials and metal materials are very important for ensuring the safety of the spacecraft operation.A scheme of using the distributed optical fiber grating sensor to monitor the process of cementing solidification for composite materials and aluminum alloy is proposed in this work.According to the structural characteristics of composite/aluminium alloy's double layer and the curing process,the related factors that caused the change of strain in the adhesive layer during cementing curing process were analyzed.The layout scheme of the fiber grating sensors and the temperature compensation methods were studied,and the encapsulation method of temperature compensation of fiber grating sensor in the process of cementing curing was given.On this basis,a monitoring system of fiber Bragg grating sensor was constructed to monitor adhesive curing process of composite/aluminium alloy,which could realize the monitoring of the solidification of glue joint.The obtained results were of great significance for improving composite cementing method of the aerospace structure and realizing the on-line monitoring of the process of cementing and timeliness.
In space structure,the bonding process and bonding effect evaluation of composite materials and metal materials are very important for ensuring the safety of the spacecraft operation.A scheme of using the distributed optical fiber grating sensor to monitor the process of cementing solidification for composite materials and aluminum alloy is proposed in this work.According to the structural characteristics of composite/aluminium alloy's double layer and the curing process,the related factors that caused the change of strain in the adhesive layer during cementing curing process were analyzed.The layout scheme of the fiber grating sensors and the temperature compensation methods were studied,and the encapsulation method of temperature compensation of fiber grating sensor in the process of cementing curing was given.On this basis,a monitoring system of fiber Bragg grating sensor was constructed to monitor adhesive curing process of composite/aluminium alloy,which could realize the monitoring of the solidification of glue joint.The obtained results were of great significance for improving composite cementing method of the aerospace structure and realizing the on-line monitoring of the process of cementing and timeliness.
引文
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[8]李鹏飞,万方义,崔卫民,等.FBG传感器在飞行器结构健康监控中的可行性研究[J].机械强度,2011,33(4):624-628.LI Pengfei,WAN Fangyi,CUI Weimin,et al.Feasibility of fbg sensor for aerocraft structure health monitoring[J].Journal of Mechanical Strength,2011,33(4):624-628.
[9]郑卜祥,宋永伦,张东生,等.光纤BRAGG光栅温度和应变传感特性的试验研究[J].仪表技术与传感器,2008(11):12-15.ZHENG Buxiang,SONG Yonglun,ZHANG Dongsheng,et al.Experimental Study on Temperature and strain sensing characteristics of fiber Bragg grating[J].Instrument Technique and Sensor,2008(11):12-15.
[10]ZHOU J,ZHOU Z,ZHANG D.Study on strain transfer characteristics of fiber Bragg grating sensors[J].Journal of Intelligent Material Systems and Structures,2010,21(11):1117-1122.
[2]乔海涛,邹贤武.复合材料胶接技术的研究进展[J].宇航材料工艺,2010(2):11-14.QIAO Haitao,ZOU Xianwu.Progress of composite bonding technique[J].Aerospace Materials&Technology,2010(2):11-14.
[3]FITTON M D,BROUGHTON J G.Variable modulus adhesives:an approach to optimised joint performance[J].International Journal of Adhesion and Adhesives,2005,25(4):329-336.
[4]韩旭,吴清文,董得义,等.室温硫化胶层建模在透镜结构分析中的应用[J].光学精密工程,2010,18(1):118-125.HAN Xu,WU Qingwen,DONG Deyi,et al.Application of RTV adhesive modeling to structure analysis of reflective mirror[J].Optics and Precision Engineering,2010,18(1):118-125.
[5]赵波.考虑弯曲效应的混元胶接单搭接头应力模型[J].机械工程学报,2008,44(10):129-137.ZHAO Bo.Theoretical stress model of mixed-modulus single-lap adhesive bonded joints considering the bending effect[J].Chinese Journal of Mechanical Engineering,2008,44(10):129-137.
[6]于秀娟,余有龙,张敏,等.光纤光栅传感器在航空航天复合材料/结构健康监测中的应用[J].激光杂志,2006,27(1):1-3.YU Xiujuan,YU Youlong,ZHANG Min,et al.Applications of fiber Bragg grating sensor for aerospace composite and structures health monitoring[J].Laser Journal,2006,27(1):1-3.
[7]张博明,郭艳丽.基于光纤传感网络的航空航天复合材料结构健康监测技术研究现状[J].上海大学学报(自然科学版),2014,20(1):33-42.ZHANG Boming,GUO Yanli.Survey of aerospace structural health monitoring research based on optic fiber sensor networks[J].Journal of Shanghai University(Natural Science Edition),2014,20(1):33-42.
[8]李鹏飞,万方义,崔卫民,等.FBG传感器在飞行器结构健康监控中的可行性研究[J].机械强度,2011,33(4):624-628.LI Pengfei,WAN Fangyi,CUI Weimin,et al.Feasibility of fbg sensor for aerocraft structure health monitoring[J].Journal of Mechanical Strength,2011,33(4):624-628.
[9]郑卜祥,宋永伦,张东生,等.光纤BRAGG光栅温度和应变传感特性的试验研究[J].仪表技术与传感器,2008(11):12-15.ZHENG Buxiang,SONG Yonglun,ZHANG Dongsheng,et al.Experimental Study on Temperature and strain sensing characteristics of fiber Bragg grating[J].Instrument Technique and Sensor,2008(11):12-15.
[10]ZHOU J,ZHOU Z,ZHANG D.Study on strain transfer characteristics of fiber Bragg grating sensors[J].Journal of Intelligent Material Systems and Structures,2010,21(11):1117-1122.