PSI - Issue 37

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Procedia Structural Integrity 37 (2022) 995–1000

ICSI 2021 The 4th International Conference on Structural Integrity Review and synthesis of stress intensity factor (SIF) solutions for circular inner cracks in round bars under tension loading ICSI 2021 The 4th International Conference on Structural Integrity Review and synthesis of stress intensity factor (SIF) solutions for circular inner cracks in round bars under tension loading

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 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

© 2022 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 Pedro Miguel Guimaraes Pires Moreira © 2022 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 Pedro Miguel Guimaraes Pires Moreira Abstract In this paper, stress i tensity factor (SIF) is calculated in a bar subjected to tensile loading, considering a circular inner crack that exhibits certain eccentricity in relation to the cylinder axis. T computation s made by means of the finite elem nt method (FEM) using a thr e dimensiona (3D) model and the J - ntegr l, the analyzed variables being the diamete and the eccentricity of th cir ular inner cra k. Results show how th SIF is higher at th point of the crack front clo es to the bar urface and tha an increase of crack eccentricity or of cra k dia eter r ises the difference between the SIF values at the opposite crack points located at minimum and maximum distance from the bar surface. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND lic nse (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Abstract In this paper, stress intensity factor (SIF) is calculated in a bar subjected to tensile loading, considering a circular inner crack that exhibits certain eccentricity in relation to the cylinder axis. The computation is made by means of the finite element method (FEM) using a three dimensional (3D) model and the J -integral, the analyzed variables being the diameter and the eccentricity of the circular inner crack. Results show how the SIF is higher at the point of the crack front closest to the bar surface and that an increase of crack eccentricity or of crack diameter raises the difference between the SIF values at the opposite crack points located at minimum and maximum distance from the bar surface. 1. Introduction In steel bars, interior failure mechanisms under high and very high cycle fatigue are produced with the formation of fish-eye pattern (with approximately circular geometry) originated from inclusions located inside the material, a phenomenon observed by Li, Deng and Liu (2016) and by Nehila, Li and Zhao (2018). 1. Introduction In st el bars, i terior f ilure mechanisms nder high and very high cycle fatigue are produced with the formation of fish-eye pattern (with approximately circular geometry) originated from inclusions located inside the material, a phenomenon observed by Li, Deng and Liu (2016) and by Nehila, Li and Zhao (2018). Keywords: cracked bar; eccentric circular inner crack; J -integral; finite element method; stress intensity factor. Keywords: cracked bar; eccentric circular inner crack; J -integral; finite element method; stress intensity factor.

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

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under the CC BY-NC-ND lic nse (https://c eativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.02.036