PSI - Issue 41

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 41 (2022) 704–711

© 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 operations of large moving systems are often compromised under high-speed and heavy duty conditions owing to the fatigue deterioration caused by surface flaws. In this context, the present research examines a novel computational model to explore the stability of stress raisers such as quarter-elliptical cracks and semi-elliptical cracks. The influences of crack-tip interactions and stress ratio effects on driving mode progression are analyzed through a damage tolerance-based analytical strategy. © 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. Keywords: Analytical strategy; crack-tip interactions: fatigue deterioration; surface flaw. 1. Introduction The protection and health monitoring of large moving systems that are vulnerable to surface flaws continue to be an important issue from the safety perspective. Therefore, it is highly desirable to develop computational models for reliable fatigue performance assessment in order to prevent the formation of hazardous stress raisers such as quarter elliptical cracks and semi-elliptical cracks during service operations. Achieving the expected endurance goals of moving systems lead to a fracture mechanics-based research. Thus, Yamashita et al. (2004) suggested that the fatigue deterioration of a semi-elliptical flaw can be analyzed combining the Paris crack growth law coupled with the finite element method. Boljanović et al. (2016) explored the behavior of the same stress raiser at the hole via the crack growth concept proposed by Kujawski (2001) and the finite element Abstract The operations of large moving systems are often compromised under high-speed and heavy duty conditions owing to the fatigue det rioration caused by surface flaws. In this context, the pr sent r searc examines a no el computat onal model t explore th stability of stress raisers such as quarter-ellipti al cracks and mi- lliptical cracks. The inf uences of crack-tip in eractions and ress ratio eff cts on d iving mode p ogr ssion re analyzed through a damage tolerance-based analytical strategy. © 2022 Th 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 u der re ponsibility of MedFract2Guest Editors. K ywords: Analytical strategy; crack-tip interactions: fatig deterioration; surface flaw. 1. Introduction The protection and health monitoring of large moving systems that are vulnerable to surface flaws continue to be an important issue from the safety perspective. Therefore, it is highly desirab e to d velop computational mod ls for reliable fatigue p r or ance ssessment in order to prev nt the formation of hazar ous stress raisers such as quarter el ptical cracks and se i-elliptical cracks du ing service operati ns. Achieving the exp cted endur n e goals of moving systems lead to a fracture mechanics-based research. Thus, Yamashita et al. (2004) suggested that the fatigue deteriora ion of semi-ellip ical flaw can be nalyzed combining the P ris crack growth law coupled wi h the finit el ment meth d. Boljanov ć et l. (2016) explored the behavior of s me stress raiser at the hole via the crack growth concept proposed by Kujawski (2001) and the finit element 2nd Mediterranean Conference on Fracture and Structural Integrity Driving mode analysis of quarter-elliptical flaw under cyclic loading Slobodanka Boljanović a *, Andrea Carpinteri b 2nd Mediterranean Conference on Fracture and Structural Integrity Driving mode analysis of quarter-elliptical flaw under cyclic loading Slobodanka Boljanović a *, Andrea Carpinteri b a Mathematical Institute of the Serbian Academy of Sciences and Arts, Kneza Mihaila 36, Belgrade 11000, Serbia b University of Parma, Department of Engineering and Architecture, Parco Area delle Scienze 181/A, Parma 43124, Italy a Mathematical Institute of the Serbian Academy of Sciences and Arts, Kneza Mihaila 36, Belgrade 11000, Serbia b University of Parma, Department of Engineering and Architecture, Parco Area delle Scienze 181/A, Parma 43124, Italy

* Corresponding author. Tel.: +381-63-805-6085; fax: +381-11-218-6105. E-mail address: slobodanka.boljanovic@mi.sanu.ac.rs * Corresponding author. Tel.: +381-63-805-6085; fax: +381-11-218-6105. E-mail address: slobodanka.boljanovic@mi.sanu.ac.rs

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. 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 u der responsibility of t MedFract2Guest 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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.080