PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 42 (2022) 80–87

© 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 the scientific committee of the 23 European Conference on Fracture – ECF23 Abstract A plate containing a semi-elliptical surface crack is selected as a typical surface crack case to investigate the effects of the bending stress parallel to the crack plane on the limit load and elastic-plastic J . Elastic and elastic-plastic FE analyses are used to obtain J values for the surface-cracked plate under stress normal to the crack plane or under biaxial stress plus through-thickness bending with/without bending stress parallel to the crack plane. The results show that the applied bending stress parallel to the crack plane does not affect the elastic J , and, therefore, the stress intensity factor (SIF), but it does affect the elastic-plastic J . A reference stress estimation method considering the bending stress parallel to the crack plane is developed, which shows good correlation to the elastic-plastic J for cases with/without the bending stress parallel to the crack plane. This method is then used to extend the developed local limit load model to include the effect of the bending stress parallel to the crack plane. © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: J-integral; Local limit load; Bending stress parallel to crack; Reference stress method 1. Introduction In structural integrity assessments of components containing defects using R6 (2019), the limit load of the defective component is one of the most important inputs. Some limit load solutions are provided in R6 for simple basic geometries like plates, cylinders and spheres. However, for complex plant components such limit load solutions are not available and users have to determine them. In order to help the R6 users to estimate the required limit load for c-plastic . Elastic and elastic-plastic FE analyses are used to obtain o 23 European Conference on Fracture - ECF23 Including effect of bending stress parallel to the crack plane on a developed local limit load model Yuebao Lei a, * a EDF Energy Nuclear Generation Ltd., Barnett Way, Barnwood, Gloucester, GL4 3RS, UK

* Corresponding author. Tel.: +44-145-265-2285. E-mail address: yuebao.lei@edf-energy.com

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

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 the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.009