PSI - Issue 41

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Procedia Structural Integrity 41 (2022) 220–231

2nd Mediterranean Conference on Fracture and Structural Integrity Modelling of delamination in rolling and sliding contacts Irina Goryacheva a,b, *, Almira Meshcheryakova a,b † a Ishlinsky Institute for Problems in Mechanics RAS, Prospekt Vernadskogo 101-1, Moscow, 119526, Russia b Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russia , , ko a a,b a I li I tit t f l i i , t - , , , i b i i i it f i l , l i , , i, i

© 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 MedFract2Guest Editors. Abstract The contact fatigue phenomenon in conditions of cyclic sliding or rolling is studied based on the model of contact fatigue damage accumulation in the subsurface layers of the material. It is assumed that the rate of the damage accumulation depends on the principal shear stress amplitudes. The results of numerical modelling show that the contact fatigue fracture process in the conditions of a constant load, acting on the sliding or rolling body, consists of the following stages: the incubation period, the running-in period with the alternating detachment of material’s fragments of certain thickness (the mechanism of de lamination) and the surface wear, and then the steady-state stage, characterizing by the surface wear with a constant rate. The influence of the sliding friction coefficient, the relative slippage and the strength properties of contacting bodies on the evolution of the accumulated damage in the surface layers and on the fatigue wear kinetics in sliding and rolling contacts has been analyzed. © 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) t t ti i iti li li i lli i t i t l t t ti l ti i t l t t i l. t i t t t t t l ti t i i l t lit . lt i l lli t t t t t ti t i t iti t t l , ti t li i lli , i t t ll i t : t i ti i , t i i period with the alternating detachment of material’s fragments of certain thickness (the i l i ti t , t the steady-stat t , t i i t it t t t . i l t li i i ti i i t, t l ti li t t t ti t ti i t l ti t l t i t l t ti i ti i li i lli t t l . t . li . . i i ti l the N D li tt :// ti . /li / c / .

Peer-review under responsibility of the MedFract2Guest Editors. Keywords: rolling contact, sliding contact, internal stresses, wear, delamination i ilit t t t it . : r lli t t, li i t t, i t r l tr , r, l i ti i

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1. Introduction Fatigue wear is one of the most common mechanisms of fracture of machine components operating under sliding or rolling friction and cyclic loading and can lead to the breakdown of tribocouplings. In fatigue wear the multiple detachment of material particles from the friction surface occurs, and the corresponding change of contact geometry during each fracture results in the redistribution of contact and internal stresses (Goryacheva, 1998). Modelling of this ti i t t i t i t ti li i lli i ti li l i l t t t i li . ti t lti l t t t i l ti l t i ti , t i t t t i t lt i t i t i ti t t i t l t , . lli t i

* Corresponding author. Tel.: +7 495 434 3692. E-mail address: goryache@ipmnet.ru i t r. l.: . - il : r i t.r rr

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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 MedFract2Guest Editors. i i rti l r t - - li ( tt ti . licenses/by-nc-nd/4.0 ) r-r i r r i ilit f t r t t it r .

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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.025