变温域纤维增强复合材料的损伤定位研究  

Damage localization of fiber-reinforced composites in variable temperature domain

作　　者：艾丽佳 张风华[2] 付涛[3] 李鹏 AI Lijia;ZHANG Fenghua;FU Tao;LI Peng(College of Physical Science and Technology,Heilongjiang University,Harbin 150080,China;National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150001,China;Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]黑龙江大学物理科学与技术学院,哈尔滨150080 [2]哈尔滨工业大学特种环境复合材料技术国防科技重点实验室,哈尔滨150001 [3]中国工程物理研究院化工材料研究所,绵阳621900

出　　处：《黑龙江大学自然科学学报》2024年第2期233-241,共9页Journal of Natural Science of Heilongjiang University

基　　金：特种环境复合材料技术国防科技重点实验室基金资助项目(6142905213510);黑龙江省自然科学基金优秀青年基金资助项目(YQ2021008)。

摘　　要：纤维增强复合材料因其轻质高强、易成型和可设计性强等优异性能,成为众多工程结构用材首选,然而其结构易产生多种形式损伤,降低了材料的可靠性和安全性,故对复合材料进行实时健康监测及损伤定位研究具有重要意义。声发射(Acoustic emission,AE)技术可以有效地检测复合材料中的微小损伤,基于光纤光栅声发射监测系统不受电磁干扰,可在多点同时测量多个物理量,但实现高精度损伤定位仍需进一步研究。为此,构建了一种四通道温度自适应光纤布拉格光栅(Fiber Bragg gratings,FBG)声发射监测系统,可以快速追踪、及时反馈、实时监测FBG的中心波长变化,提高定位精度,在变温域内对碳纤维增强复合材料的损伤定位进行监测,研究结果表明,该系统平均损伤定位误差为12%。Fiber-reinforced composites have become the first choice for many engineering structures due to their excellent properties such as light weight,high strength,easy molding,and better design ability.However,their structures are prone to various damages,which reduce the reliability and safety of materials.It is of great significance to carry out real-time health monitoring and damage localization research on composite materials.Acoustic emission(AE)technology can effectively detect microscopic damage of composite materials.In comparison,the fiber-grating based acoustic emission monitoring system is not affected by electromagnetic interference and can measure multiple physical quantities at multiple points at the same time,but further research is still needed to achieve high precision damage localization.Therefore,a four-channel temperature adaptive fiber Bragg grating(FBG)acoustic emission monitoring system is built,which can quickly track,timely feedback and real-time monitor the central wavelength change of FBG,improve the positioning accuracy,and monitor the damage localization of carbon fiber reinforced composites in variable temperature range,and the results show that the average damage positioning error of the system is only 12%.

关 键 词：光纤布拉格光栅 声发射 碳纤维增强复合材料 损伤定位 

分 类 号：O439[机械工程—光学工程]