PSI - Issue 47

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

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Procedia Structural Integrity 47 (2023) 782–788

© 2023 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 IGF27 chairpersons acoustic-emission signals were generated due to ultrasonic waves propagation in a composite material and registered with PES and FOS. The analysis of time delay sequences revealed the power law for the distribution of delay time and energy that is characteristic of nonlinear dynamic systems with numerous degrees of freedoms revealing the Self-Organized Criticality (SOC). Similar signs were established in damage-failure transition as specific type of critical phenomena - the structural-scaling transition in defects ensemble for the interpretation of the two parameters fracture criteria in composite materials. © 2023 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) Abstract Acoustic emission as diagnostics tool was used by piezoelectric (PES) and fiber-optic (FOS) sensors to detect a signal emitted by defects during damage-failure transition. Optical fibers in the interferometer’s measurement system served as sensors of ultrasonic waves and were embedded into composite material when the sample was manufactured. The acoustic-emission signals were generated due to ultrasonic waves propagation in a composite material and registered with PES and FOS. The analysis of time delay sequences revealed the power law for the distribution of delay time and energy that is characteristic of nonlinear dynamic systems with numerous degrees of freedoms revealing the Self-Organized Criticality (SOC). Similar signs were established in damage-failure transition as specific type of critical phenomena - the structural-scaling transition in defects ensemble for the interpretation of the two parameters fracture criteria in composite materials. © 2023 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) 27th International Conference on Fracture and Structural Integrity (IGF27) Staging analysis of damage-failure transition in composite materials by optic acoustic sensors Oleg Naimark b1 , Ivan Gladky a , Sergey Uvarov b , Gleb Shipunov b , Einar Agletdinov b , Michail Bannikov b a Joint-Stock Company «UEC-Aviadvigatel» , 93, Komsomolsky prospect, Perm 614990, Russia b Institute of Continuous Media Mechanics of Urals Division of RAS, 1, Acad. Korolev str., Perm 614013, Russia b1 a b b b , b a Joint-Stock Company «UEC-Aviadvigatel» , 93, Komsomolsky prospect, Perm 614990, Russia b Institute of Continuous Media Mechanics of Urals Division of RAS, 1, Acad. Korolev str., Perm 614013, Russia Abstract Acoustic emission as diagnostics tool was used by piezoelectric (PES) and fiber-optic (FOS) sensors to detect a signal emitted by defects during damage-failure transition. Optical fibers in the interferometer’s measurement system served as sensors of ultrasonic waves and were embedded into composite material when the sample was manufactured. The

Peer-review under responsibility of the IGF27 chairpersons Keywords: Optic acoustic sensors, damage-failure transition staging; Peer-review under responsibility of the IGF27 chairpersons Keywords: Optic acoustic sensors, damage-failure transition staging;

1. Introduction Acoustic emission as technical diagnostics using the piezoelectric sensors (PES) and fiber-optic (FOS) sensors can 1. Acoustic emission as technical diagnostics using the piezoelectric sensors (PES) and fiber-optic (FOS) sensors can

* Corresponding author. E-mail address: naimark@icmm.ru * Corresponding author. E-mail address: naimark@icmm.ru

2452-3216 © 2023 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 IGF27 chairpersons 2452-3216 © 2023 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 IGF27 chairpersons

2452-3216 © 2023 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 IGF27 chairpersons 10.1016/j.prostr.2023.07.041