The durability of flexible eddy current array (FECA) sensors in harsh service environments

Abstract Sensors for structural health monitoring (SHM) need to be permanently integrated on structures and withstand the harsh service environments, which has been a big challenge for the application of SHM in aircrafts. This paper focuses on the durability of flexible eddy current array (FECA) sen...

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Main Authors: Yujian Song, Tao Chen, Ronghong Cui, Yuting He, Xianghong Fan, Binlin Ma
Format: Article
Language:English
Published: Nature Publishing Group 2021-05-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-021-89750-y
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spelling doaj-afc69c49d02b425fa88632983d67b7f52021-05-16T11:23:54ZengNature Publishing GroupScientific Reports2045-23222021-05-0111111410.1038/s41598-021-89750-yThe durability of flexible eddy current array (FECA) sensors in harsh service environmentsYujian Song0Tao Chen1Ronghong Cui2Yuting He3Xianghong Fan4Binlin Ma5Aeronautic Engineering College, Air Force Engineering UniversityAeronautic Engineering College, Air Force Engineering UniversityAeronautic Engineering College, Air Force Engineering UniversityAeronautic Engineering College, Air Force Engineering UniversityAeronautic Engineering College, Air Force Engineering UniversityAeronautic Engineering College, Air Force Engineering UniversityAbstract Sensors for structural health monitoring (SHM) need to be permanently integrated on structures and withstand the harsh service environments, which has been a big challenge for the application of SHM in aircrafts. This paper focuses on the durability of flexible eddy current array (FECA) sensors in harsh service environments of aircrafts, including vibration environment and several typical exposed environments. First, a kind of FECA sensor is illustrated and its integration method is proposed. Moreover, in order to study the durability of the sensor in vibration environment, the modal analysis is performed by the finite element method. According to the simulation results, the durability experiment in vibration environment is carried out under the fourth order vibration mode, which makes the sensor suffer the harshest vibration loads. During the vibration experiment, output signals of the sensor keep stable and the sensor is well bonded to the structure, which shows the integrated sensor has high durability in vibration environment. Finally, the durability of integrated sensors is separately tested in three exposed environments, including salt fog corrosion environment, fluid immersion environment, as well as hygrothermal and ultraviolet-radiation environment. After these environmental exposure experiments, all sensors are well bonded to structures and can effectively monitor fatigue cracks, which shows great durability. Therefore, FECA sensors can survive in harsh service environments of aircrafts, which provides important support for the engineering applications of FECA sensors.https://doi.org/10.1038/s41598-021-89750-y
collection DOAJ
language English
format Article
sources DOAJ
author Yujian Song
Tao Chen
Ronghong Cui
Yuting He
Xianghong Fan
Binlin Ma
spellingShingle Yujian Song
Tao Chen
Ronghong Cui
Yuting He
Xianghong Fan
Binlin Ma
The durability of flexible eddy current array (FECA) sensors in harsh service environments
Scientific Reports
author_facet Yujian Song
Tao Chen
Ronghong Cui
Yuting He
Xianghong Fan
Binlin Ma
author_sort Yujian Song
title The durability of flexible eddy current array (FECA) sensors in harsh service environments
title_short The durability of flexible eddy current array (FECA) sensors in harsh service environments
title_full The durability of flexible eddy current array (FECA) sensors in harsh service environments
title_fullStr The durability of flexible eddy current array (FECA) sensors in harsh service environments
title_full_unstemmed The durability of flexible eddy current array (FECA) sensors in harsh service environments
title_sort durability of flexible eddy current array (feca) sensors in harsh service environments
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2021-05-01
description Abstract Sensors for structural health monitoring (SHM) need to be permanently integrated on structures and withstand the harsh service environments, which has been a big challenge for the application of SHM in aircrafts. This paper focuses on the durability of flexible eddy current array (FECA) sensors in harsh service environments of aircrafts, including vibration environment and several typical exposed environments. First, a kind of FECA sensor is illustrated and its integration method is proposed. Moreover, in order to study the durability of the sensor in vibration environment, the modal analysis is performed by the finite element method. According to the simulation results, the durability experiment in vibration environment is carried out under the fourth order vibration mode, which makes the sensor suffer the harshest vibration loads. During the vibration experiment, output signals of the sensor keep stable and the sensor is well bonded to the structure, which shows the integrated sensor has high durability in vibration environment. Finally, the durability of integrated sensors is separately tested in three exposed environments, including salt fog corrosion environment, fluid immersion environment, as well as hygrothermal and ultraviolet-radiation environment. After these environmental exposure experiments, all sensors are well bonded to structures and can effectively monitor fatigue cracks, which shows great durability. Therefore, FECA sensors can survive in harsh service environments of aircrafts, which provides important support for the engineering applications of FECA sensors.
url https://doi.org/10.1038/s41598-021-89750-y
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