PSI - Issue 66

ScienceDirect Structural Integrity Procedia 00 (2025) 000–000 Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 66 (2024) 535–542

8th International Conference on Crack Paths Failure resistance analysis of fatigue-critical surface flaws Slobodanka Boljanovi ć 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 Abstract Sudden loss of large systems capacity due to environmentally-induced surface flaws is one of key issues from the safety point of view. In this context, the analytical life solutions are generated through the present research work, quantifying the driving force interactions of part-through flaws and stress ratio effects. Damage tolerance-based design strategy is here proposed with the aim to provide insights on the decision-making processes required for both immediate and strategic fatigue-relevant analysis, crucial for the viability and efficiency of large system operations. © 2025 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 2024 Organizers Keywords: Failure analysis; surface flaws. 1. Introduction Dynamic load environment often leads to changes in the performance of large systems due to the appearance of surface flaws, jeopardizing relevant service operations in aerospace, civil, maritime, and defense sectors. Therefore, the need to develop reliable computational design models that allow real-time quantification of fatigue responses for such stress raisers, represented as quarter-elliptical corner or semi-elliptical crack-like flaws, is still an important aspect in failure-critical investigations. Ensuring the sustainability of the modern systems requires careful selection of fracture mechanics-based assessment models for safety-relevant evaluations. In this context, Smith and Cooper (1989) have suggested a numerical technique using finite elements for failure-critical analysis, whereas Jones et al. (2004) have explored the stress state field of 8th International Conference on Crack Paths Failure resistance analysis of fatigue-critical surface flaws Slobodanka Boljanovi ć 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 Abstract Sudden loss of large systems capacity due to environmentally-induced surface flaws is one of key issues from the safety point of view. In this context, the analytical life solutions are generated through the present research work, quantifying the driving force interactions of part-through flaws and stress ratio effects. Damage tolerance-based design strategy is here proposed with the aim to provide insights on the decision-making processes required for both immediate and strategic fatigue-relevant analysis, crucial for the viability and efficiency of large system operations. © 2025 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 2024 Organizers Keywords: Failure analysis; surface flaws. 1. Introduction Dynamic load environment often leads to changes in the performance of large systems due to the appearance of surface flaws, jeopardizing relevant service operations in aerospace, civil, maritime, and defense sectors. Therefore, the need to develop reliable computational design models that allow real-time quantification of fatigue responses for such stress raisers, represented as quarter-elliptical corner or semi-elliptical crack-like flaws, is still an important aspect in failure-critical investigations. Ensuring the sustainability of the modern systems requires careful selection of fracture mechanics-based assessment models for safety-relevant evaluations. In this context, Smith and Cooper (1989) have suggested a numerical technique using finite elements for failure-critical analysis, whereas Jones et al. (2004) have explored the stress state field of © 2025 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 2024 Organizers

* Corresponding author. Tel.:+381-63-805-6085; fax:+381-11-218-6105. E-mail address: slobodanka.boljanovic@gmail.com * Corresponding author. Tel.:+381-63-805-6085; fax:+381-11-218-6105. E-mail address: slobodanka.boljanovic@gmail.com

2452-3216 © 2025 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 2024 Organizers 2452-3216 © 2025 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 2024 Organizers

2452-3216 © 2025 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 2024 Organizers 10.1016/j.prostr.2024.11.107