复合材料真空袋成型加压点的光纤光栅监测及优化  

Monitoring and Optimizing the Pressured Point of Composite Vacuum Bag Molding Process with Fiber Bragg Grating sensors

作　　者：卢少微[1,2] 马克明[1,2] 熊需海[1,2] 王晓强[1,2] 贾彩霞[1,2] 

机构地区：[1]沈阳航空航天大学辽宁省通用航空重点实验室,辽宁沈阳110136 [2]沈阳航空航天大学航空航天工程学部,辽宁沈阳110136

出　　处：《中国激光》2014年第8期175-179,共5页Chinese Journal of Lasers

基　　金：国防基础科研项目(A352010006);工信部民机专项;航空科学基金(2013ZA54002);辽宁省高等学校优秀人才支持计划(LJQ2011018)

摘　　要：光纤光栅对复合材料固化过程中的应变和温度具有非常高的灵敏度。提出了利用双光纤光栅传感器监测复合材料真空袋成型固化过程的温度/应变变化,获得凝胶点信息,从而优化加压时机。实验结果表明,光纤光栅和动态力学分析法(DMTA)确定的凝胶点信息(凝胶温度/时间)非常一致,扫描电子显微镜(SEM)表明加压点优化后制备的复合材料具有最佳界面,中心层未出现分层情况。该方法可实现对复合材料固化工艺的监测与优化。Fiber Bragg grating （FBG） sensor is sensitive to strain and temperature during composite curing process. A new method is raised to monitor the temperature and strain with double FBG sensors during composite vacuum bag molding process. The gel point and pressured point are obtained and optimized. The experimental results show that the gel temperature and time obtained by FBG sensors and dynamic mechanical thermal analysis （DMTA） are very consistency, and the composite manufactured under optimum pressured point has excellent interface performance and no delamination in the middle layer from scanning electron microscopy （SEM）. This method can realize monitoring and optimizing of composite vacuum bag molding process.

关 键 词：传感器 光纤光栅 复合材料 真空袋成型 凝胶点 加压点 

分 类 号：TQ320[化学工程—合成树脂塑料工业] TP212.14[自动化与计算机技术—检测技术与自动化装置]