PSI - Issue 39

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2021) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2021) 000–000

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Procedia Structural Integrity 39 (2022) 470–474

7th International Conference on Crack Paths Analysis of near-tip fatigue crack path deflection in metallic materials Jesús Toribio*, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain 7th International Conference on Crack Paths Analysis of near-tip fatigue crack path deflection in metallic materials Jesús Toribio*, Beatriz González, Juan-Carlos Matos Fracture & Structural Integrity Research Group (FSIRG), University of al manca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain

© 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 © 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 article studies the plasticity-induced fatigue crack growth retardation in a steel caused by crack path deflection in the near-tip region. To this end, the finite element method was used to model the crack with its deflected kink. The results allow a calculation of the fatigue crack propagation rate for the two analyzed crack configurations, i.e.: (i) locally-multiaxial fatigue (main crack plus deflected kink) and (ii) uniaxial fatigue (only main crack). It is seen that the retardation effect rises with the increase of the initial deflected crack tip angle. © 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 article studies the plasticity-induced fatigue crack growth retardation in a steel caused by crack path deflection in the near-tip region. To this end, the finite element method was used to model the crack with its deflected kink. The results allow a calculation of the fatigue crack propagation rate for the two analyzed crack configurations, i.e.: (i) locally-multiaxial fatigue (main crack plus deflected kink) and (ii) uniaxial fatigue (only main crack). It is seen that the retardation effect rises with the increase of the initial deflected crack tip angle. 1. Introduction Fatigue crack paths usually exhibit continuous micro-deflections and surface micro-roughness caused by material microstructure (Toribio et al ., 2014), so that the non-linear crack configuration should be taken into account in the matter of crack-morphological aspects in fracture mechanics (Kitagawa et al ., 1975). 1. Introduction Fatigue crack paths usually exhibit continuous micro-deflections and surface micro-roughness caused by material icrostructure (Toribio et al ., 2014), so that the non-linear crack configuration should be taken into account in the matter of crack-morphological aspects in fracture mechanics (Kitagawa et al ., 1975). Keywords: crack tip deflection; finite element method; plasticity-induced fatigue crack growth; retardation phenomenon. Keywords: crack tip deflection; finite element method; plasticity-induced fatigue crack growth; retardation phenomenon.

* Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es * Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es

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 ope 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.2022.03.117