CFRP-钢胶接结构内部损伤的增强型电磁感应热成像检测
Enhanced electromagnetic induction thermography detection of internal damage in CFRP-steel adhesively bonded structures
张玉彬 1陈丽娜 1刘鹏谦 1赵擎 1刘蕊 1王龙博 1谢静 1徐长航1
作者信息
- 1. 中国石油大学(华东)机电工程学院,青岛 266580
- 折叠
摘要
碳纤维增强复合材料(Carbon fiber reinforced polymer,CFRP)通过胶接方式广泛应用于钢结构加固,因此对于加固后形成的CFRP-钢胶接结构进行检测以确保其结构完整性和安全性变得至关重要.然而,CFRP、环氧树脂和钢各自具有不同的物理性质,给准确检测此类特殊混合结构的内部损伤带来了挑战.为解决这一问题,本研究提出了一种增强型电磁感应热成像检测方法,以增强CFRP-钢胶接结构内部损伤的检测.该方法首先利用常规电磁感应热成像系统获得被检物体表面的温度数据,然后对表面温度数据进行预处理.接着,采用设计的卷积自编码器(Convolutional autoencoder,CAE)模型从预处理后的表面温度数据中提取像素级深度热特征,最后利用提取的深度热特征生成增强的检测结果,从而提高损伤的可见性.对含有脱粘、分层和裂纹的CFRP-钢胶接结构试件进行的实验结果表明,增强型电磁感应热成像能够有效提高内部损伤的可见性,这有助于准确评估CFRP-钢胶接结构的质量,从而提高此类结构的安全性.
Abstract
Carbon fiber reinforced polymer(CFRP)are widely used in steel structure reinforcement through adhesively bonding,making it crucial to inspect CFRP-steel adhesively bonded structures(ABCSS)to ensure their structural integrity and safety.However,the distinct physical properties of CFRP,epoxy resin,and steel pose challenges in accurately detecting internal damages in such specialized hybrid structures.To address this issue,this study proposes an enhanced electromagnetic induction thermography detection method to enhance the detection of internal damages in ABCSS.This method initially utilizes a conventional electromagnetic induction thermo-graphy system to obtain surface temperature data of the object under inspection,followed by preprocessing of the surface temperature data.Subsequently,a designed convolutional autoencoder(CAE)model is employed to extract pixel-level deep thermal features from the preprocessed surface temperature data.Finally,the extracted deep thermal features are utilized to generate enhanced detection results,thereby improving the visibility of damages.Experimental results on ABCSS specimens containing delamination,debonding,and cracks demonstrate that enhanced electromagnetic in-duction thermography effectively enhances the visibility of internal damages.This enhancement contributes to accurately assessing the quality of ABCSS,thereby improving the safety of such structures.
关键词
CFRP-钢胶接结构/增强型电磁感应热成像/卷积自编码器/特征提取/无损检测Key words
CFRP-steel adhesively bonded structures/enhanced electromagnetic induction thermography/con-volutional autoencoder(CAE)/feature extraction/non-destructive testing引用本文复制引用
基金项目
国家重点研发计划专项课题(2023YFC3009202)
中石油重大科技合作项目(ZD2019-184-004-04)
出版年
2024
NETL
NSTL
万方数据