基于分布式光纤传感器的复合材料阶梯搭接接头疲劳损伤监测

Fatigue Damage Monitoring of a Composite Step Lap Joint Using Distributed Optical Fibre Sensors.

作者信息

Wong Leslie, Chowdhury Nabil, Wang John, Chiu Wing Kong, Kodikara Jayantha

机构信息

Department of Mechanical & Aerospace Engineering, Monash University, Wellington Road, Clayton, VIC 3168, Australia.

Aerospace Division, Defence Science and Technology Group, 506 Lorimer Street, Fishermans Bend, VIC 3207, Australia.

出版信息

Materials (Basel). 2016 May 14;9(5):374. doi: 10.3390/ma9050374.

DOI:10.3390/ma9050374

PMID:28773496

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5503041/

Abstract

Over the past few decades, there has been a considerable interest in the use of distributed optical fibre sensors (DOFS) for structural health monitoring of composite structures. In aerospace-related work, health monitoring of the adhesive joints of composites has become more significant, as they can suffer from cracking and delamination, which can have a significant impact on the integrity of the joint. In this paper, a swept-wavelength interferometry (SWI) based DOFS technique is used to monitor the fatigue in a flush step lap joint composite structure. The presented results will show the potential application of distributed optical fibre sensor for damage detection, as well as monitoring the fatigue crack growth along the bondline of a step lap joint composite structure. The results confirmed that a distributed optical fibre sensor is able to enhance the detection of localised damage in a structure.

摘要

在过去几十年里，人们对使用分布式光纤传感器（DOFS）进行复合材料结构的健康监测产生了浓厚兴趣。在与航空航天相关的工作中，复合材料粘接接头的健康监测变得更加重要，因为它们可能会出现开裂和分层，这会对接头的完整性产生重大影响。本文采用基于扫频干涉测量法（SWI）的分布式光纤传感器技术来监测平齐阶梯搭接接头复合材料结构中的疲劳情况。所呈现的结果将展示分布式光纤传感器在损伤检测方面的潜在应用，以及监测阶梯搭接接头复合材料结构粘结线处疲劳裂纹的扩展情况。结果证实，分布式光纤传感器能够增强对结构中局部损伤的检测能力。