智能结构中光纤智能夹层力学特性的实验研究

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。试验还表明,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。

Experimental Research on Mechanics characteristic of Fiber-Optic Smart Layer in Smart Structure

Composites with high strength-weight ratio and modulus-weight ratio are widely employed in engineering.The Fiber-Optic Smart Layer, which is attached onto composite laminate surface or embedded inside composite, is manafactured on the basis of modularization and integration of optical fiber self-diagnosing system.The FOSL does not affect the structural strength of the host composites via axial tensile test and flatwise tension test,which can be embedded inside composite for health monitoring.The optical strength is related linearly with the strain of layer embedded single mode crossing optical fiber stain region and calibrated before embedding.Thus,the optical fiber sensing networks and self-diagnosing modules of FOSL enable to realize the smart health monitoring of composites.