PSI - Issue 45

ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 45 (2023) 96–103

© 2023 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 Prof. Andrei Kotousov Abstract Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations. © 2023 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 Prof. Andrei Kotousov Keywords: CFRP; compact-tension specimen; fatigue crack growth rate (FCGR); stress intensity factor (SIF), traction-separation relationship. 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) Numerical simulation of compact-tension specimens repaired by CFRP Yuanpeng Zheng a,b , Tao Chen a,b, *, Cheng Huang c , Weijian Wu d a Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai 200092, China b Department of Structural Engineering, Tongji University, Shanghai 200092, China c Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom d Department of Civil and Mechanical Engineering, Technical University of Denmark, Lyngby 2800 Kgs., Denmark Abstract Carbon fiber reinforced polymer (CFRP) reinforcement is emerging as an efficient means of elongating the service life of cracked metallic structures. An experimental program was conducted to investigate the fatigue behavior of compact-tension (CT) specimens repaired by different CFRP configurations. In parallel, numerical simulations of the fatigue crack growth in the CFRP-repaired specimens were also conducted. The eXtended finite element method (XFEM) was employed and shown to provide accurate and efficient calculations of the stress intensity factor (SIF), without remeshing the models during crack propagation. The mechanical properties of the adhesive were simulated using a cohesive traction-separation relationship. Good agreement was observed between the numerical and experimental results of the SIF and fatigue life, with the latter numerically predicted based on the experimentally derived Paris law constants. Insight into the debonding behavior between the CFRP and steel specimens has also been provided. Due allowance for the weakening effect of damage initiation and evolution between the FRP-steel interfaces is required in the reinforcement calculations. © 2023 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 Prof. Andrei Kotousov Keywords: CFRP; compact-tension specimen; fatigue crack growth rate (FCGR); stress intensity factor (SIF), traction-separation relationship. 17th Asia-Pacific Conference on Fracture and Strength and the 13th Conference on Structural Integrity and Failure (APCFS 2022 & SIF 2022) Numerical simulation of compact-tension specimens repaired by CFRP Yuanpeng Zheng a,b , Tao Chen a,b, *, Cheng Huang c , Weijian Wu d a Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai 200092, China b Department of Structural Engineering, Tongji University, Shanghai 200092, China c Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom d Department of Civil and Mechanical Engineering, Technical University of Denmark, Lyngby 2800 Kgs., Denmark

* Corresponding author. Tel.: 86-21-65982928. E-mail address: t.chen@tongji.edu.cn * Corresponding author. Tel.: 86-21-65982928. E-mail address: t.chen@tongji.edu.cn

2452-3216 © 2023 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 Prof. Andrei Kotousov 2452-3216 © 2023 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 Prof. Andrei Kotousov

2452-3216 © 2023 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 Prof. Andrei Kotousov 10.1016/j.prostr.2023.05.019