PSI - Issue 32

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ScienceDirect

Procedia Structural Integrity 32 (2021) 194–201 Structural Integrity Procedia 00 (2021) 000–000 Structural Integrity Procedia 00 (2021) 000–000

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© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” Abstract The paper proposes a mathematical model for estimating changes in the strain fields caused by the installation of a substrate with an optical fiber sensor on the surface of the controlled structure. It also analyzes the information on changes in the strain tensor components in the zone of sensor location at di ff erent dimensions of the structure. It has been shown that these changes depend on the ratio of mechanical characteristics of the substrate and the material of the structure with the fiber optic strain sensor placed on its surface. A comparative analysis of strain changes is made under di ff erent loading conditions of the structure with the substrate-bonded optical fiber sensor placed on its surface. © 2021 The Authors. Published by Elsevier B.V. his is an open access article under the CC BY- C-ND license (http: // cr ativecommons.org / licenses / by-nc-nd / 4.0 / ) P e ie unde responsibility of the scientific committee of the XXIIth Winter Sch ol on Continuous Media Mechanics. Keywords: fiber optic sensors; substrate; strain redistribution; finite element method Fiber-optic strain sensor (FOSS) based on a fiber Bragg grating is a relatively new strain measurement tool com pared to other types of sensors. In the article by Lee et al. (2003), fiber Bragg gratings (FBGs) were applied to perform real-time measurements of dynamic strains inside a small-scale airplane wing model subjected to wind tunnel tests. During these tests the flutter instability was detected with the aid of FBG sensors embedded in the wing skin and the e ffi ciency of this sensor system for monitoring the stress-strain state of an aircraft wing under flight conditions was es timated. The article by Ghoshal et al. (2015) surveys experimental studies of di ff erent types of sensors, including fiber Bragg grating sensors embedded in composite components of army rotorcrafts. The paper also discusses the results of dynamic loading experiments on a composite flexbeam of army rotorcraft with an embedded optical fiber, which were conducted with the aim to detect the beginning of delamination in the flexbeam. A review article by Wymore et al. (2015) analyzes the current state and the main problems of monitoring the mechanical condition of wind turbines. It has been noted that fiber optic sensors can be used to measure the deformation of such structures. The article by Abstract The paper proposes a mathematical model for estimating changes in the strain fields caused by the installation of a substrate with an optical fiber sensor on the surface of the controlled structure. It also analyzes the information on changes in the strain tensor components in the zone of sensor location at di ff erent dimensions of the structure. It has been shown that these changes depend on the ratio of mechanical characteristics of the substrate and the material of the structure with the fiber optic strain sensor placed on its surface. A comparative analysis of strain changes is made under di ff erent loading conditions of the structure with the substrate-bonded optical fiber sensor placed on its surface. © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics. Keywords: fiber optic sensors; substrate; strain redistribution; finite element method 1. Introduction Fiber-optic strain sensor (FOSS) based on a fiber Bragg grating is a relatively new strain measurement tool com pared to other types of sensors. In the article by Lee et al. (2003), fiber Bragg gratings (FBGs) were applied to perform real-time measurements of dynamic strains inside a small-scale airplane wing model subjected to wind tunnel tests. During these tests the flutter instability was detected with the aid of FBG sensors embedded in the wing skin and the e ffi ciency of this sensor system for monitoring the stress-strain state of an aircraft wing under flight conditions was es timated. The article by Ghoshal et al. (2015) surveys experimental studies of di ff erent types of sensors, including fiber Bragg grating sensors embedded in composite components of army rotorcrafts. The paper also discusses the results of dynamic loading experiments on a composite flexbeam of army rotorcraft with an embedded optical fiber, which were conducted with the aim to detect the beginning of delamination in the flexbeam. A review article by Wymore et al. (2015) analyzes the current state and the main problems of monitoring the mechanical condition of wind turbines. It has been noted that fiber optic sensors can be used to measure the deformation of such structures. The article by XXIIth Winter School on Continuous Media Mechanics Analysis of strain changes caused by placing the substrate-bonded optical fiber sensor on the structure surface Andrey Yu. Fedorov a, ∗ , Elizaveta R. Vindokurova b a Institute of Continuous Media Mechanics UB RAS, 1 Academician Korolev Street, Perm 614018, Russian Federation b Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm, 614990, Russian Federation XXIIth Winter School on Continuous Media Mechanics Analysis of strain changes caused by placing the substrate-bonded optical fiber sensor on the structure surface Andrey Yu. Fedorov a, ∗ , Elizaveta R. Vindokurova b a Institute of Continuous Media Mechanics UB RAS, 1 Academician Korolev Street, Perm 614018, Russian Federation b Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm, 614990, Russian Federation 1. Introduction

∗ Corresponding author. Tel.: + 7-342-273-8330 ; fax: + 7-342-237-84-87. E-mail address: fedorov@icmm.ru ∗ Corresponding author. Tel.: + 7-342-273-8330 ; fax: + 7-342-237-84-87. E-mail address: fedorov@icmm.ru

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics” 10.1016/j.prostr.2021.09.028 2210-7843 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics. 2210-7843 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of the scientific committee of the XXIIth Winter School on Continuous Media Mechanics.