PSI - Issue 39

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 ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 39 (2022) 157–160

© 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 CP 2021 – Guest Editors Abstract The aim of the present paper is to investigate the effect of stabilisation of the hysteresis loop under hard loading on steel C45E. C45E, which is widely used for the manufacture of shafts and characterised by its superior strength. Here, we experimentally investigate the phenomenon of plastic deformation stabilisation at rigid loading, depending on the amplitude and loading rate. Using the hysteresis loop at each cycle, we calculate the accumulated damage in the material during the stabilisation of plastic deformation. © 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) 1. Introduction Steel С45E is widely used for all industrial applications requiring significant wear resistance and strength. In this regard, a number of experimental and theoretical studies on low-cycle and high-cycle fatigue are presented in the literature (Yang 2005, Luo 2012, Gu et al. 2021). The accumulation of plastic deformations during low-cycle deformation under loads slightly exceeding the yield point is essential to predicting the general fatigue curve. In addition, the parameters of the hysteresis loop, such as maximum and minimum stress or strain, indicate the type of material deformation in following selected regimes: cyclic softening (Kang et al. 2005), cyclic stabilised (Makarov et al. 2015) and cyclic hardening (Yang 2005). Taking into account possible errors in the small displacement of the 7th International Conference on Crack Paths Low-cycle deformation of steel C45E under rigid loading Nina Selyutina a,b, *, Ivan Smirnov a , Yuri Petrov a,b a Saint Petersburg State University, 7/9, Universitetskaya nab., St. Petersburg, 199034, Russia b IPME RAS, Extreme States Dynamics Department, V.O., Bolshoj pr., 61, St. Petersburg, 199178, Russia Abstract The aim of the present paper is to investigate the effect of stabilisation of the hysteresis loop under hard loading on steel C45E. C45E, which is widely used for the manufacture of shafts and characterised b its superi r strengt . Here, we experimentally investigate t e phenomenon of plastic deformation stabili ation at rigid loa ing, depending on the amplitude and loading r te. Using the hysteresis loop at each cycle, we calculate the accumulated amage in the material during the stabilisation of plastic deformation. © 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 CP 2021 – Guest Editors Keywords: Hysteresis loop; steel C45E; hysteresis strain width 1. Introduction Steel С45E is widely used for all industrial applications requiring significant wear resistance and strength. In this regard, a number of xperimental and theoretical studies on low-cycle and high-cycl fa igu re presen ed i t e literature (Yang 2005, Luo 2012, Gu et al. 2021). The accumulation of plasti d formations du ing low-cycl deformation u der loads slightly exceeding the yield point is essential t predicting the general fat gue curve. In addition, the parameters of the h ster sis loop, such as maximum a d minimum stress or strain, indicate the type of material deform tion in f llowing s l cted regimes: cyclic softening (Kang et al. 2005), cyclic stabilised (Makarov et al. 2015) and cyclic hardening (Yang 2005). Taking into accou t possibl errors in the small displacement of the 7th International Conference on Crack Paths Low-cycle deformation of steel C45E under rigid loading Nina Selyutina a,b, *, Ivan Smirnov a , Yuri Petrov a,b a Saint Petersburg State University, 7/9, Universitetskaya nab., St. Petersburg, 199034, Russia b IPME RAS, Extreme States Dynamics Department, V.O., Bolshoj pr., 61, St. Petersburg, 199178, Russia Peer-review under responsibility of CP 2021 – Guest Editors Keywords: Hysteresis loop; steel C45E; hysteresis strain width

* Corresponding author. E-mail address: nina.selutina@gmail.com * Corresponding author. E-mail address: nina.selutina@gmail.com

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 CP 2021 – Guest Editors 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 CP 2021 – Guest Editors

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 CP 2021 – Guest Editors 10.1016/j.prostr.2022.03.084