PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2022) 000 – 000

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Procedia Structural Integrity 42 (2022) 307–314

23 European Conference on Fracture - ECF23 Measurement of strain and temperature by fiber-optic sensors embedded into samples manufactured by additive technology

Valerii Matveenko a , Natalia Kosheleva a *, Grigorii Serovaev a a Institute of Continuous Media Mechanics UB RAS, 1, Akademika Koroleva Str., Perm, 614068, Russia

© 2022 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 23 European Conference on Fracture – ECF23 Abstract The paper demonstrates the possibility of using embedded point and distributed fiber-optic sensors to register data on the mechanical state of structures made by fused deposition modeling from thermoplastic materials. The performance of two types of fiber-optic sensors was demonstrated at the stage of sample fabrication. Uniform strength beam was taken as a sample. Temperature and strain were continuously recorded using the embedded fiber-optic sensors during the sample fabrication. Based on the readings of point and distributed fiber-optic sensors, graphs and surfaces of strain and temperature distributions along the length of the sample over time are presented. These parameters allow further evaluation of the inhomogeneity of strain and temperature distribution along the sample. Comparison of the experimental data obtained from two types of fiber-optic sensors during the sample fabrication was carried out. © 2020 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 23 European Conference on Fracture - ECF23 Keywords: Point fiber-optic sensors; fiber Bragg grating; distributed fiber-optic sensors; technological strains; temperature measurement; additive technologies 1. Introduction Currently, there is a significant and growing interest in additive technologies (3D printing) due to the possibility of cheaper production, easy prototyping of the final product, a wide range of existing materials and the possibility of manufacturing objects of complex geometric shapes. Elements made using additive manufacturing are used in many

* Corresponding author. Tel.: +7(342)-237-83-08. E-mail address: kosheleva.n@icmm.ru

2452-3216 © 2020 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 23 European Conference on Fracture - ECF23

2452-3216 © 2022 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 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.038