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) 479–483

7th International Conference on Crack Paths Analysis of near-tip fatigue crack path bifurcation 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 bifurcation 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 plasticity-induc d fatigue crack growth retardation in metals caused by crack ath bifurcation in the ear-tip regi n. To this end, t finite element method was used to model th crack with its bifu cated tip under several stress intensity factor (SIF) ranges. The results s ow the appearance of a retardation effect in the fatigue crack growth rate of the bifurcated crack in relation to the growth rate of the fully straight crack. © 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 plasticity-induced fatigue crack growth retardation in metals caused by crack path bifurcation in the near-tip region. To this end, the finite element method was used to model the crack with its bifurcated tip under several stress intensity factor (SIF) ranges. The results show the appearance of a retardation effect in the fatigue crack growth rate of the bifurcated crack in relation to the growth rate of the fully straight crack. Keywords: crack tip bifurcation; bifurcated crack path; finite element method; plasticity-induced fatigue crack growth; retardation phenomena. Keywords: crack tip bifurcation; bifurcated crack path; finite element method; plasticity-induced fatigue crack growth; retardation phenomena. 1. Introduction Microstructural issues play a relevant role in the matter of fatigue crack paths and crack bifurcation , so that the micro-roughness and tortuosity of the fatigue crack path induces in the material a greater resistance to fatigue crack growth by means of microstructurally-induced fatigue crack growth retardation (Toribio et al ., 2015; 2017). 1. Introduction Microstructural issues play a relevant role in the matter of fatigue crack paths and crack bifurcation , so that the micro-roughness and tortuosity of the fatigue crack path induces in the material a greater resistance to fatigue crack growth by means of microstructurally-induced fatigue crack growth retardation (Toribio et al ., 2015; 2017).

* 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.2022.03.119