PSI - Issue 36

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

ScienceDirect

www.elsevier.com/locate/procedia

Procedia Structural Integrity 36 (2022) 166–170

1st Virtual International Conference “In service Damage of Materials: Diagnostics and Prediction” Prediction of jump-like creep using preliminary plastic strain

Iryna Didych a, *, Oleh Yasniy a , Sergiy Fedak a ,Yuri Lapusta b a Ternopil Ivan Puluj National Technical University, 56 Ruska St., Ternopil 46001, Ukraine b University Clermont Auvergne, CNRS, SIGMA Clermont, Institut e Pascal, Clermont-Ferrand F-63000, France

© 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 conference Guest Editors Abstract There was studied a jump-like creep of AMg6 aluminum alloy on its preliminary plastic strain during the tensile test in the soft mode of loading. Experimental studies showed that the creep of AMg6 aluminum alloy is accompanied by jump-like increments of strain, the values of which are similar to the "steps" of the tensile strain. The methods of experimental studies are often complicated and time-consuming. Therefore, it is more efficient to predict the magnitude of the jump during the creep by methods of machine learning, in particular, neural networks, which show the best results. It was determined that in this case the error of neural networks method was equal to 4.8%. © 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 conference Guest Editors Keywords: AMg6 aluminum alloy; jump-like creep; machine learning; neural networks

Nomenclature  p (  i ) stress  c

stress level

maximum stress level in cycle

 max

loading amplitude stress increment

 a   p

creep increment  (  i ) strain of the jump

* Corresponding author. Tel.: +8 097 227 20 74 E-mail address: iryna.didych@tntu.edu.ua

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 conference Guest Editors

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 conference Guest Editors 10.1016/j.prostr.2022.01.019