Online monitoring of fatigue crack under variable amplitude loading driven by multispectral features fusion of FBG sensors

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-01-13 DOI:10.1016/j.yofte.2024.104121

Yan Zhao , Jianxun Gao , Dianyin Hu , Zhimin Jiang , Xuemin Wang , Jinchao Pan , Rongqiao Wang

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引用次数: 0

Abstract

This paper proposed an online fatigue crack propagation quantitative monitoring method based on fiber Bragg grating (FBG) sensors by introducing the multispectral features fusion and convolutional neural network (CNN) approach. Fatigue crack propagation under variable amplitude loading is simulated by ABAQUS- FRANC3D co-simulation to obtain FBG sensed strain information. FBG distortion spectra were reconstructed using the transfer matrix method (TMM), and the relationship between five damage indicators and fatigue crack, such as center wavelength, spectral area, full width at quarter maximum (FWQM), fractal dimension, and overlapping area, was investigated. Based on this, the FBG spectrum damage feature matrix was constructed to perform multispectral feature fusion. A quantitative monitoring model between damage features and crack length was developed using CNN method to realize real-time monitoring of fatigue crack length, and crack length simulation analysis and fatigue crack propagation test were carried out on aluminum alloy. The results show that the monitoring average absolute error of fatigue crack length is 0.067 mm by proposed method in simulation analysis, and the monitoring average absolute error of fatigue crack length is 0.52 mm in fatigue crack propagation experiment, which verifies the accuracy and effectiveness of this method.

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.