PSI - Issue 32

ScienceDirect Available online at www.sciencedirect.com Sci nceD rect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com

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

Procedia Structural Integrity 32 (2021) 93–100

© 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 present work is devoted to the experimental and numerical assessment of energy balance in titanium alloy Ti-0.8Al-0.8Mn in cyclic deformation mode. According to the thermodynamic theory of strength, the measure of damage is internal energy stored in material as a result of deformation. In this work stored energy was determined experimentally as a difference between plastic work and heat dissipation. It was shown that stored energy rate slows down when approaching the moment of damage. The numerical simulation of energy balance during cyclic deformation has shown satisfactory agreement with the experimental data. © 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” Keywords: Stored energy; cyclic deformation; heat dissipation; plastic work; thermodynamic theory of strength 1. Introduction The problem of predicting the fatigue strength characteristics of metals has not yet been fully resolved, and it is relevant due to the wide variety of metal alloys, types of stress state and acting loads. To date, there are a lot of works devoted to assessing the damage of materials based on various strength criteria. Molsky and Glinka (1981), Glinka (1985), Moftakhar et al. (1995), Benedetti et al. (2020) are used strain energy density as a criterion for the fracture of metallic materials under various loading conditions. Generalized plastic work criterion is applied by Aksen et al. (2020) to the uniaxial tensile and Nakajima stretch forming tests to predict the forming limits of an XXIIth Winter School on Continuous Media Mechanics The evolution of energy balance in titanium alloy Ti-0.8Al-0.8Mn in cyclic deformation mode Iziumova A.Yu. a *, Vshivkov A.N. a , Prokhorov A.E. a , Mubassarova V.A. a , Panteleev I.A. a , Kostina A.A. a , Plekhov O.A. a a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Academika Koroleva st, 1, Perm,614013, Russia Abstract The present work is devoted to the experimental and numerical assessment of energy balance in titanium alloy Ti-0.8Al-0.8Mn in cyclic deformation mode. According to the thermo y a ic theory of strength, the measure of damage is internal energy stored material as a result of deformatio . In t is work stored energy was determined experimentally as a differe ce between plastic work nd heat dissipation. It was shown that stored en rgy rate slows down when approaching the moment of damage. The numerical simulation of e ergy balance during cyclic d fo mation has shown satisfactory agreement with the experiment l data. © 2021 The A thors. 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 re ponsibility of scientific committe of the XXIIth Winter School on Continuous Media Mechanics” Keywords: Stored energy; cyclic deformation; heat dissipation; plastic work; thermodynamic theory of strength 1. Introduction The problem of predicting the fatigue strength characteristics of metals has not yet been fully resolved, and it is relevant due to the wi e variety of metal alloys, types of stre s state nd acti g loads. To date, there are a lo of works devoted to assessing the damag of materials based on various strength criteria. M lsky and Glinka (1981), Glinka (1985), Moftakhar e al. (1995), Bened tti et al. (2020) e ed strain energy density as a criterion for the fracture of metallic materials under various loading conditions. Gen ralized plastic work criterion is applied by Aksen et al. (2020) to he uniaxial tens le and Nakajima s retch forming t sts to predict the fo mi g limits of an XXIIth Winter School on Continuous Media Mechanics The evolution of energy balance in titanium alloy Ti-0.8Al-0.8Mn in cyclic deformation mode Iziumova A.Yu. a *, Vshivkov A.N. a , Prokhorov A.E. a , Mubassarova V.A. a , Panteleev I.A. a , Kostina A.A. a , Plekhov O.A. a a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Academika Koroleva st, 1, Perm,614013, Russia

* Corresponding author. Tel.: +7 342 2378317; fax: +7 342 2378487. E-mail address: fedorova@icmm.ru * Corresponding author. Tel.: +7 342 2378317; fax: +7 342 2378487. E-mail address: fedorova@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” 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”

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.2021.09.014