光纤智能夹层制作工艺及试验研究

Research on manufacture and testing of fiber-optic smart layer

根据智能结构中光纤自诊断系统模块化要求,制作出光纤智能夹层。这种智能夹层不仅具有在光纤接头部位未出现断裂及智能夹层中光纤传感器未出现损坏的特点,而且具有光纤传感器的高灵敏度特性,可以铺设于复合材料表面或埋入复合材料内部。在此基础上,对智能夹层试件分别进行了轴向拉伸和四点弯曲试验。试验表明:在一定应变范围内,单膜交错光纤中光强-应变之间具有良好的线性关系,可以在埋入复合材料之前进行标定。利用智能夹层中光纤传感网络或自诊断模块,可以实现对智能结构的在线监测。

Aimed at the demands of modularization of optical fiber self-diagnosing system for smart structures,the fiber-optic smart layer(FOSL) has been manafactured,which has characteristics of no fractured in joints of optical fiber,no broken of optical fiber sensors of FOSL,high sensitivity of optical fiber sensors and can be surfaced onto composite laminates or embedded inside composite laminates.It has been shown that the optical strength is linear with strain of layer embedded single mode crossing optical fiber by axial tensile test and four point bending test to a certain extent of strain and calibration is performed before embedding composite.So,it can be achieved in line monitoring of smart structures by optical fiber sensing networks and self-diagnosing modules of FOSL.