Finite element simulation of photoacoustic fiber optic sensors for surface rust detection on a steel rod 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII: SPIE Smart Structures and Materials + Nondestructive Evaluation And Health Monitoring Conference, 5-8 March 2018, Denver, Colorado, United States
出版年
2018
页码
105991N.1-105991N.13
会议地点
Denver
作者单位
Department of Civil and Enviromental EngineeringDepartment of Civil and Enviromental EngineeringDepartment of Civil and Enviromental EngineeringDepartment of Electric and Computer Engineering University of Massachusetts Lowell One University Avenue, Lowell, MA 01854, U.S.ADepartment of Civil and Enviromental Engineering
作者
Qixiang Tang;Jones Owusu Twumasi;Jie Hu;Xingwei Wang;Tzuyang Yu
摘要
Structural steel members have become integral components in the construction of civil engineering infrastructures such as bridges, stadiums, and shopping centers due to versatility of steel. Owing to the uniqueness in the design and construction of steel structures, rigorous non-destructive evaluation techniques are needed during construction and operation processes to prevent the loss of human lives and properties. This research aims at investigating the application of photoacoustic fiber optic transducers (FOT) for detecting surface rust of a steel rod. Surface ultrasonic waves propagation in intact and corroded steel rods was simulated using finite element method (FEM). Radial displacements were collected and short-time Fourier transform (STFT) was applied to obtain the spectrogram. It was found that the presence of surface rust between the FOT and the receiver can be detected in both time and frequency domain. In addition, spectrogram can be used to locate and quantify surface rust. Furthermore, a surface rust detection algorithm utilizing the FOT has been proposed for detection, location and quantification of the surface rust.
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关键词
Finite element method (FEM);damage detection;surface rust;ultrasonic testing
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