Performance and mechanism of a graphene assembled film-based flexible sensor for strain monitoring of civil infrastructures

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-03-06 DOI:10.1016/j.sna.2025.116430

Shun Weng , Zhiyue Zhang , Ke Gao , Hongping Zhu , Bin Hu , Daping He , Fan Wang

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引用次数: 0

Abstract

In the context of large strain measurement in structural health monitoring (SHM) of civil infrastructures, the sensing range and accuracy of existing strain sensors typically faces limitations. This study develops a graphene-assembled film (GAF) based flexible strain sensor with a large strain range that two times larger than the metal foil strain sensor. The sensing performance and underlying interfacial contact mechanisms of the sensor were investigated at both macro and micro scales. Experimental results indicated that the GAF-based sensor had good repeatability and exhibited piecewise linearity. Characterization using scanning electron microscope (SEM) revealed that the piecewise linearity is mainly attributed to the unfolding, sliding, and cracks of the micro folds in the GAF. Results of a uniaxial tensile test of steel plates demonstrated that the GAF-based sensor not only has a larger working range but also maintains the same level of sensing accuracy as foil strain sensor. The proposed sensor also features low cost and industrialized fabrication, indicating its potential for large strain monitoring in civil SHM.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...