PSI - Issue 37

ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 37 (2022) 570–575

© 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 Pedro Miguel Guimaraes Pires Moreira This work is devoted to the study of fatigue crack propagation features in titanium Grade 2 in order to develop effective methods for fatigue crack detection and prediction of its propagation rate. Two characteristic stages of heat dissipation are identified during fatigue crack growth. Also the stored energy during fatigue crack propagation is calculated by experimental data of mechanical work and heat dissipation. The stored energy rate is smoother than heat dissipation rate and it slows down when approaching the moment of damage. Cluster analysis of the signal allows us to identify two most probable clusters. The correlation between the acoustic emission energy and heat dissipation was found to be a harbinger of the approaching transition from stable to unstable crack growth. The relation between fatigue crack growth rate and the processes of energy dissipation and acoustic emission can be used in development of intelligent monitoring systems for assessment of current state of structure. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: Type your keywords here, separated by semicolons ; 1. Introduction The development of intelligent monitoring systems requires adequate modeling damage and deformation in structural materials as well as the classification and analysis of fracture precursors. This work is devoted to the study of fatigue crack propagation features in structural materials in order to develop effective methods for fatigue crack detection and prediction of its propagation rate. The relationship between fatigue crack growth rate in metals and the This work is devoted to the study of fatigue crack propagation features in titanium Grade 2 in order to develop effective methods for fatigue crack detection an predic on of its rate. Two ch racteristic stages of heat dissipation are iden ified du ing fatigue crack growth. Also the stored energy dur ng f igue cra k propagation is calculated by experimental da a of mechanical work and heat dissipation. The stored energy rate is smoother than he dissipation rate and it slows down when appro ching the moment of damage. Cluster analysis of th ignal allows us to ident fy two most probable clusters. The correl tio be ween th ac ustic emission en gy nd heat dissipation was found to be a harbinger of the approaching ransition fr m stable to unstable crack growth. The relation betw en fatigue crack growth rate and the processes of ene gy dissipation and ac ustic emissio c n be used in development of i tellig nt monitoring systems for assessment of urr nt stat of structure. © 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 u der responsibility of Pedro Miguel Guimara s Pires Moreira Keywords: Type your keywords here, separated by semicolons ; 1. Introduction The development of intelligent monitoring systems requires adequate modeling damage and deformation in structural materials as well as th classificatio and analysis of fractur precurs rs. This work is devoted to the study of fa igue cr ck propagation features in structural material in order to d velop effective metho s f r fatigu crack detection and prediction of its propagation rate. The relat onship between fatigue crack growth rate in me als and the ICSI 2021 The 4th International Conference on Structural Integrity Energy balance and acoustic emission in titanium Grade 2 under fatigue A. Vshivkov*, A. Iziumova, V. Mubassarova, A. Prokhorov, I. Panteleev, O. Plekhov Institute of Continuous Media Mechanics UB RAS, Academika Koroleva st, 1, 614013 Perm, Russian Federation ICSI 2021 The 4th International Conference on Structural Integrity Energy balance and acoustic emission in titanium Grade 2 under fatigue A. Vshivkov*, A. Iziumova, V. Mubassarova, A. Prokhorov, I. Panteleev, O. Plekhov Institute of Continuous Media Mechanics UB RAS, Academika Koroleva st, 1, 614013 Perm, Russian Federation Abstract Abstract

* Corresponding author. Tel.: +7-342-237-83-17; fax: +7-342-237-84-87. E-mail address: vshivkov.@icmm.ru * Corresponding author. Tel.: +7-342-237-83-17; fax: +7-342-237-84-87. E-mail address: vshivkov.@icmm.ru

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 Pedro Miguel Guimaraes Pires Moreira 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 Pedro Miguel Guimaraes Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.124