PSI - Issue 39

ScienceDirect Structural Integrity Procedia 00 (2020) 000–000 Structural Integrity Procedia 00 (2020) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 39 (2022) 204–213

© 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 study was mainly concerned with the fatigue crack initiation points transition relationship between the weld toe and weld root in Load-carrying Cruciform Weld Joint (LCWJ) considering the mismatched filler material yield strength and geometrical sizes under cyclic loading conditions. The critical failure locations were investigated by the experimental tests and numerical simulations. To analyze the fatigue characteristic indicators of the potential fatigue initiations, different configurations of mismatch ratios and local geometries (plate thickness, weld size and penetration ratio) were designed to conduct the fatigue tests and cyclic calculations of CLWJ. Subsequently, New uniform effective notch energy indicator was proposed to characterize the low and high cycle fatigue life by extending the SED method. The related analytical formulations for weld toe and weld root were established to predict the low and high cycle fatigue assessment indicator of LCWJ considering the effects of plasticity and yield strength mismatch and geometry configurations. The effective notch energy relationship between the weld toe and weld root in LCWJ was estimated by the established analytical solutions. © 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: Load-carrying welded joint; low and high cycle fatigue; material heterogeneity; failure transition; effective notch energy. 1. Introduction Marine structures active in coastal, offshore, and deep-sea are subjected to overlarge force, moment or cyclic loading induced by the environment and structural service conditions. The Load-carrying Cruciform Weld Joint Abstract This study was mainly concerned with the fatigue crack initiation points transition relationship between the weld toe and weld root in Load-carrying Crucif rm Weld Joint (LCWJ) considering the mismatched filler material yield strength an geometrical sizes under cy lic loading conditions. The critical failure locations wer investigate by the exp rimental tests and numerical simulations. To anal ze the fati ue characteristic indicators of the potential fatigue initiations, different co figuratio s of ism tch ratios a d local geometries (plat thickness, weld size and penetration ratio) were designed to conduct the fatigue tests and cyclic calculatio s of CLWJ. Subsequently, New uniform eff ctive notch energy indicator was proposed to characterize the low and high cycle f tigue life by extending the SED method. Th related analytical formulations for weld toe and weld root were establis ed to pr dict th low and high cycle fatigue assessment indicator of LCWJ consideri g the effects of plasticity and yi ld strength mismatch and geometry configurations. The effective notch energy relationship between the weld toe and weld root in LCWJ was estimated by the established analytical solutions. © 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 u der responsibility of CP 2021 – Guest Editors Keywords: Load-carrying welded joint; low and high cycle fatigue; material heterogeneity; failure transition; effective notch energy. 1. Introduction Marine structures active in coastal, offshore, and deep-sea are subjected to overlarge force, moment or cyclic loading induced by the environment and tructur l service conditions. The Load-car ying Crucif r Weld Joint 7th International Conference on Crack Paths Fatigue failure transition analysis of load carrying cruciform welded joints by extended local approach Wei Song a, * , Guangtao Zhou b , Shoupan Wei c , Muchun Cui c , Filippo Berto d a School of Mechanical & Electrical Engineering, Xuzhou University of Technology, Xuzhou 221018, PR China; b College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; c Xuzhou XCMG Mining Machinery Company, Xuzhou, 221000, China c Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway. 7th International Conference on Crack Paths Fatigue failure transition analysis of load carrying cruciform welded joints by extended local approach Wei Song a, * , Guangtao Zhou b , Shoupan Wei c , Muchun Cui c , Filippo Berto d a School of Mechanical & Electrical Engineering, Xuzhou University of Technology, Xuzhou 221018, PR China; b College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; c Xuzhou XCMG Mining Machinery Company, Xuzhou, 221000, China c Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway.

* Corresponding author. E-mail address: swingways@hotmail.com * Corresponding author. E-mail address: swingways@hotmail.com

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo

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.2022.03.089