PSI - Issue 52

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 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 52 (2024) 376–381

© 2023 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 Professor Ferri Aliabadi Abstract Propagation of a short fatigue crack directly from a corrosion pit is investigated within this work. A corroded rectangular specimen subjected to remote tensile cyclic loading is modelled via finite element method. Propagation of the angled crack is then controlled by both loading modes (I + II). A parametric study is performed to estimate the directions of further crack propagation for various geometrical configurations. Corrosion pit size is varied to simulate various levels of corrosion, and the analysis is carried out for a range of crack lengths and different initial crack inclination angles. Assumptions of linear elastic fracture mechanics are accepted, and classical maximum tangential stress criterion is applied to calculate the angles of crack deflection. Results obtained are discussed and are prepared to mutual comparison with observations of decrease of fracture mechanical/fatigue properties on real specimens subjected to relevant experiments. © 2023 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 Professor Ferri Aliabadi Keywords: High-strength steels; Finite element analysis; Corrosion pit; Crack propagation; MTS fracture criterion 1. Introduction and motivation High-strength steels (HSS) are often exposed to combination of corrosion and fatigue loading during their service life. Using a structure in an aggressive environment, produces nearly unavoidably corrosion pits and defects on its surface. Such kinds of surface damage can cause crack nucleation and/or additionally decrease of mechanical and fatigue properties, see e.g. Balbín et al. (2021), Cui et al. (2020), Cheng et al. (2021), Fatoba and Akid (2022), Guo et Abstract Propagation of a short fatigue crack directly from a corrosion pit is investigated within this work. A corroded rectangular specimen subjected to remote tensile cyclic loading is modelled via finite element method. Propagation of the angled crack is then controlled by both loading modes (I + II). A parametric study is performed to estimate the directions of further crack propagation for various geometrical configurations. Corrosion pit size is varied to simulate various levels of corrosion, and the analysis is carried out for a range of crack lengths and different initial crack inclination angles. Assumptions of linear elastic fracture mechanics are accepted, and classical maximum tangential stress criterion is applied to calculate the angles of crack deflection. Results obtained are discussed and are prepared to mutual comparison with observations of decrease of fracture mechanical/fatigue properties on real specimens subjected to relevant experiments. © 2023 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 Professor Ferri Aliabadi Keywords: High-strength steels; Finite element analysis; Corrosion pit; Crack propagation; MTS fracture criterion 1. Introduction and motivation High-strength steels (HSS) are often exposed to combination of corrosion and fatigue loading during their service life. Using a structure in an aggressive environment, produces nearly unavoidably corrosion pits and defects on its surface. Such kinds of surface damage can cause crack nucleation and/or additionally decrease of mechanical and fatigue properties, see e.g. Balbín et al. (2021), Cui et al. (2020), Cheng et al. (2021), Fatoba and Akid (2022), Guo et Fracture, Damage and Structural Health Monitoring Fatigue behavior of high strength steels under various levels of corrosion Lucie Malíková a,b * , Anna Benešová a,b , Mohammad Al Khazali b , Stanislav Seitl a,b a Czech Academy of Sciences, Institute of Physics of Materials, v. v. i., Žižkova 513/22, 616 00 Brno, Czech Republic b Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, C zech Republic Fracture, Damage and Structural Health Monitoring Fatigue behavior of high strength steels under various levels of corrosion Lucie Malíková a,b * , Anna Benešová a,b , Mohammad Al Khazali b , Stanislav Seitl a,b a Czech Academy of Sciences, Institute of Physics of Materials, v. v. i., Žižkova 513/22, 616 00 Brno, Czech Republic b Brno University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Veveří 331/95, 602 00 Brno, C zech Republic

* Corresponding author. Tel.: +420541147381. E-mail address: malikova.l@fce.vutbr.cz * Corresponding author. Tel.: +420541147381. E-mail address: malikova.l@fce.vutbr.cz

2452-3216 © 2023 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 Professor Ferri Aliabadi 2452-3216 © 2023 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 Professor Ferri Aliabadi

2452-3216 © 2023 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 Professor Ferri Aliabadi 10.1016/j.prostr.2023.12.037