Optical Fiber Sensor Monitoring System of Composite Structures for Damage Tolerance Design

本研究是为实现航空复合材料结构损伤容限设计而研制的新型光纤传感监测系统的基础性研究。首先，本文针对当前先进复合材料的特点，开展了“损伤萌生与扩展的可视化及其理论表述”的研究，作为后续健康监测发展的基础背景研究。在此基础上，研制了两种不同的光纤传感器监测系统，用于航天复合材料结构的损伤监测。一个是“兰姆波检测监测系统”，另一个是“分布式应变监测系统”。这两种光纤传感器监测系统的设计，特别是在复合材料结构的损伤演化的特征。两种系统的结合为实际航空复合材料结构的损伤演化提供了更可靠、更准确的表征。

This study deals with the fundamental study of a novel optical fiber sensor monitoring system to realize the damage tolerance design of aerospace composite structures. First,"Visualization of damage initiation and growth and its theoretical formulation"is conducted for current advanced composites as a basic background research for the following health monitoring development. Then two different optical fiber sensor monitoring systems are developed to monitor the damage evolution in aerospace composite structures. One is"Monitoring system with Lamb wave detection"and the other is"Distributed strain monitoring system". Both optical fiber sensor monitoring systems are designed to characterize the damage evolution in composite structures in particular. Combination of two systems provides a more reliable and accurate characterization of the damage evolution in practical aerospace composite structures.