PSI - Issue 39

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 il l li t . i ir t. Structural Integrity Procedia 00 (2019) 000–000

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ScienceDirect

Procedia Structural Integrity 39 (2022) 347–363

© 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 work presents a new approach based on the Crack Tip Opening Displacement (CTOD) for studying the fatigue crack growth. The plastic component of the CTOD is employed for predicting the crack propagation on austenitic stainless steel. This is in contrast to Linear Elastic Fracture Mechanics analysis based on the Stress Intensity Factor (SIF) (Ewalds and Wanhill 1984). The current method is also valid beyond Small Scale Yielding (Antunes et al. 2016)(Antunes et al. 2017a)(Borges et al. 2020) as it incorporates naturally the plasticity effects taking place at the crack tip (Lopez-Crespo et al. 2018). The approach is based on post-processing the full-field displacement information generated by Digital Image Correlation technique (Chernyatin et al. 2018). Such technique is used to monitor the crack advance throughout the test (Cruces et al. 2020). The post-processing procedure employed for extracting the plastic component of the CTOD is described in detail. The results on steel CT specimens appear very promising. © 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: Plastic component of CTOD; Austenitic stainless steel; Fatigue crack growth t . l ti t t i l i ti t ti t iti t i l t l. i i i t t t i l ti t i l i t t t it t l ill . t t i l li ll l i l i t t l. t t l. t l. it i t t ll t l ti it t t i l t t ti t l. . i t i t ll i l i l t i ti t i it l l ti t i ti t l. . t i i t it t t t t t t t l. . t i l t ti t l ti t t i i i t il. lt t l i i i . t r . li ed by ELSEVIER B.V. i i rti l r t - - li ( tt :// r ti . r /li / - - / . ) r-r i r r i ilit f t it r : l ti t f ; t iti t i l t l; ti r r t 7th International Conference on Crack Paths Fatigue crack propagation studies based on the plastic component of the CTOD evaluated from Digital Image Correlation data Muhammad Ajmal 1 , Cristina Lopez-Crespo 1,2 , Alejandro. S. Cruces 1 , Fernando V. Antunes 3 , Pablo Lopez-Crespo 1* 1 Department of Civil and Materials Engineering, University of Malaga, C/ Doctor Ortiz Ramos, s/n, 29071 Malaga, Spain – plopezcrespo@uma.es 2 Politechnic Institute Jesus Marin, C/Politecnico, 1, 29007 Malaga, Spain 3 CEEMPRE, Department of Mechanical Engineering, University of Coimbra, Portugal Abstract m 1 , 1,2 , . . 1 , . 3 , P 1 t t f i il t i l i i , i it f l , / t ti , / , l , i l . lit i I tit t i , / lit i , , l , i , t t f i l i i , i it f i , t l i t t i i i l t t i t ti

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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 i i rti l r t - - li ( tt :// r ti . r /li / - - / . ) r-r i r r i ilit f t it r

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.2022.03.104