【作者】 梁大开； 李东升； 熊克；

【Author】 LIANG Da kai LI Dong sheng XIONG Ke (The Aeronautic Science Key Laboratory for Smart Materials and Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China)

【机构】 南京航空航天大学智能材料与结构航空科技重点实验室；

【摘要】 复合材料以其比强度和比模量高、成型方便等优越性而在现代工程中占有重要地位。本文根据光纤自诊断系统模块化、集成化要求,制作出光纤智能夹层,它可以铺设于复合材料结构表面或埋入复合材料结构内部。对智能夹层试件的轴向拉伸试验和层间拉伸试验表明,光纤智能夹层的埋入对复合材料结构的强度性能无显著影响,可以埋入复合材料结构内部并实施健康监测。对智能夹层试件的轴向拉伸试验表明,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,可以实现对复合材料结构的健康监测。更多还原

【Abstract】 Composites have been played an important role in the modern engineering for their advantages ofbeing high strength-weight ratio and modulus-weight ratio and convienient for molding.The Fiber-Optic SmartLayer,which is surface onto composite laminates or embedded inside composite laminates,has beenmanafactured on the basis of modularization and integration of optical fiber self-diagnosing system.The FOSLspecimen is shown not to degrade the structural strength of the host composites by axial tensile test and flatwisetension test.This proves that the FOSL can be embedded inside composite and used for structural healthmonitoring.It is given that the optical strength to be linear with strain of layer embedded single mode crossingoptical fiber by axial tensile test to a certain extent of stain and performed on calibration before embeddingcomposite.So,it can be achieved structural health monitoring of composites and structures by optical fibersensing networks and self-diagnosing modules of FOSL.更多还原