PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000 il l li i i t t l t it i

www.elsevier.com/locate/procedia . l i . /l t / i

ScienceDirect

Procedia Structural Integrity 42 (2022) 537–544

© 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 This article describes the methodology for determining the parameters and constants of the Lemaitre-type damage model based on 25Cr1Mo1V steel. The model implements the Voce isotropic hardening and Armstrong-Frederick kinematic hardening laws. The algorithm for identifying constants and parameters is based on standard uniaxial tension tests to describe isotropic hardening, and low-cycle fatigue tests to determine damage model constants and kinematic hardening parameters. The method is valid for all alloys whose behavior patterns can be described by the presented model representations. On the basis of the found constants and parameters, cyclic loading of cylindrical specimens was simulated with the finite element method and a fatigue curve for 25Cr1Mo1V steel was obtained. A good agreement between the experimental and predicted fatigue life was achieved. © 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: Lemaitre model, damage, kinematic hardening, isotropic hardening, Bauschinger effect; 1. Introduction Under the action of cyclic loads, material fatigue is caused by a complex physical process, which is characterized by the nucleation, interaction and development of damage in the multiaxial stress state. Since the introduction of the scalar damage parameter by Kachanov (1958) and its physical justification by Rabotnov (1963), damage accumulation models have been further developed by Gurson (1977), Murakami and . . , . . , . . . . . This is an open access artic . . it l, , i ti i , i t i i , i t; 23 European Conference on Fracture - ECF23 Constants and parameters of the damage accumulation model with isotropic and kinematic hardening for 25Cr1Mo1V steel D.I. Fedorenkov*, D.A. Kosov, A.V. Tumanov Institute of Power Engineering and Advanced Technologies, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation tit t f i i l i , i tifi t , i f i , , i ti

* Tel.: +7-917-253-12-65. E-mail address: dif-96@mail.ru l.: . il i il.

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 l i . . i i ti l t li tt :// ti . /li / / . / t . li

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.2022.12.068