PSI - Issue 39

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 39 (2022) 409–418

© 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 This paper investigates two different methods to predict crack initiation direction in fretting problems subjected to partial slip conditions. One of them is based on the Critical Direction Method (CDM) combined with the Smith Watson and Topper (SWT) fatigue parameter. The other consists in simulating early crack propagation through a Linear Elastic Fracture Mechanics (LEFM) approach associated with the SWT parameter. For validation of the methods, experimental data from fretting tests conducted on an AA7050- T7451 alloy were used. Results have shown that the CDM-based model provides very accurate estimates, whereas the LEFM-based approach failed to properly reproduce experimental observations. © 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: Fretting fatigue, wear, crack path, CDM. 1. Introduction The so-called fretting problem takes place when two contacting parts experience a relative micro slip due to the action of external oscillatory loads. Besides, if at least one of the parts is also subjected to fatigue loads, one has the phenomenon known as fretting fatigue (Bhatti and Waha, 2018). The main outcomes of fretting are surface wear and early crack initiation due to the high-stress gradient generated by the contact itself (Vingsbo and Söderberg, 1988). This is an open access article under C-N s 7th International Conference on Crack Paths Early crack orientation prediction methods under fretting fatigue loading A.L. Pinto a,b *, R. A. Cardoso c , R. Talemi b , J. A. Araújo a a Department of Mechanical Engineering, University of Brasília, Brasilia, DF, 70910-900, Brazil. b Department of Materials Engineering, KU Leuven, 3001, Leuven, Belgium. c Department of Mechanical Engineering, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil. a,b c R. Ta b a

* Corresponding author. Tel.: +55-61-99284-3006. E-mail address: andreluiseng.mecanica@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 10.1016/j.prostr.2022.03.110