PSI - Issue 39

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

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ScienceDirect

Procedia Structural Integrity 39 (2022) 632–637

© 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 Fretting is a contact phenomenon affecting the behaviour of metallic structural components subjected to vibrations or small oscillatory movements, and it has been recognized as the primary failure mode in many engineering applications. In more detail, due to the high stress gradients in the vicinity of the surface between two components in contact, the nucleation of cracks appears, thus leading to the failure of the metallic structure. In such a condition, the main cracks are expected to nucleate in correspondence to the stress concentration region, that is, the edge of the contact. However, cracks starting within the contact zone close to the edge are often experimentally observed. In the present paper, an analytical methodology recently proposed for the fretting fatigue assessment of metallic structures is employed in order to simulate an experimental campaign available in the literature, carried out on a 7050-T7451 aluminium alloy. Such a methodology is based on the joint application of the multiaxial fatigue criterion by Carpinteri et al. and the critical direction method by Araújo et al. First, the crack path orientation is determined for each loading configuration tested in the above-mentioned experimental campaign, by assuming the crack nucleation location in correspondence to the contact trailing edge. Then, a crack nucleation location inside the contact surface is adopted, in order to evaluate the crack path orientation. Finally, the results obtained are compared to the experimental observations available in the literature. © 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: Al 7050-T7451 alloy; analytical methodology; crack nucleation location; critical direction method; critical plane-based criterion. Thi 7th International Conference on Crack Paths Influence of crack nucleation location on fretting fatigue crack path Andrea Zanichelli a, *, Andrea Carpinteri a , Camilla Ronchei b , Daniela Scorza c , Sabrina Vantadori a a Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, Parma, 43124, Italy b Department of Civil Engineering, University of Calabria, via Pietro Bucci, Arcavacata di Rende (CS), 87036, Italy c Department of Engineering, University of Naples Parthenope, Centro Direzionale Isola C4, Naples, 80143, Italy Daniela Scorza c , Sabrina Vantadori

* Corresponding author. Tel.: +39 0521 905923. E-mail address: andrea.zanichelli@unipr.it

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 This is

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.2022.03.136