PSI - Issue 64

Quentin Sourisseau et al. / Procedia Structural Integrity 64 (2024) 893–900 Quentin SOURISSEAU/ Structural Integrity Procedia 00 (2019) 000 – 000

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to simulate full size samples and determine corresponding numerical ultimate capacities. Such samples were also tested and the comparison between numerical expectations and experimental results proved that a good correlation existed, confirming the possibility of using such approach for the design assessment of bonded FRP patches. It is interesting to note that, in the presented case, a similar competition between different interfaces during the failure process was observed both on fracture mechanics investigations (equivalent interface samples) and large size samples investigations proving the adequacy of the method. Additional investigations would yet be needed to improve the robustness of the methodology, especially on the equivalent interface samples’ geometry through a parametric analysis on the results or investigations on alternative materials. The presented study was also carried out on hand-lay-up fabricated samples and good results were obtained. To be able to propose a complete design methodology, there are still some issues that need to be solved regarding durability of such assembly. Fatigue investigations were realized and promising results were obtained. Yet, this should be further investigated in the future. Acknowledgements This work was carried out in the project JIP Strength Bond Offshore initiated by Bureau Veritas in 2019 and completed in 2023. The authors wish to acknowledge the partners of this project for their support: Bureau Veritas, Total Energies, Petrobras, Naval Group, Siemens, Infracore Company and ColdPad. References ASTM D5528, 2014. Test Method for Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites, ASTM Standard. ASTM D7905, 2014. Standard test method for determination of the mode II interlaminar fracture toughness of unidirectional fiber-reinforced polymer matrix composites, ASTM Standard. ASTM D6671, 2001. Standard Test Method for Mixed Mode I-Mode II Interlaminar Fracture Toughness of Unidirectional Fiber Reinforced Polymer Matrix Composites. ASTM Standard. Chataigner, S., Caron, J.F., Benzarti, K., Quiertant, M., Aubagnac, C., 2011. Use of a single lap shear test to characterize composite-to-concrete or composite-to-steel bonded interfaces, Construction and Building materials, Vol.25: 468-478. Da Silva, L. F. M., Oschner, A., 2008. Modeling of Adhesively Bonded Joints. Springer-Verlag Berlin Heidelberg. Deydier, M., Paboeuf, S., Sourisseau, Q., 2023. Application of cohesive elements on large bonded steel patch specimens, based on cohesive law calibrated with standard tests. Proceedings of the International Conference on Durability, Maintenance and Repair of Structures, DRMS. Ghafoori, E., Yu, Q., Haghani, R., Hosseini, A., Hadigeh, A., Gu, X., Motavalli, M., Zhao, X., 2019. Adhesively bonded CFRP composites for steel strengthening: an overview. Proceedings of the Fifth Conference on Smart Monitoring, Assessment, and Rehabilitation of Civil Structures. Kamruzzaman, M., Jumaat, M.Z., Ramli Sulong, N.H., Saiful Islam, A.B.M., 2014. A review on strengthening steel beams using FRP under fatigue, Technology Developments in Structural Health Monitoring and Integrity Maintenance, Hindawi. Leffler, K., Alfredsson, K. S., Stigh, U., 2007. Shear behaviour of adhesive layers, International Journal of Solids and Structures, 44:530-545. NR546, 2022. Hull in composite, plywood and high density polyethylene materials, Bureau Veritas Rules. Paboeuf, S., Deydier, M., Sourisseau, Q., Quéméré, M.O., Court, J.P., Paillusseau, C., 2023. Strength assessment methods for adhesively bonded repair, Proceedings of the International Conference of Offshore Mechanics and Arctic Engineering, OMAE. Rice, J.R., 1968. A path independent integral and the approximate analysis of strain concentration by notches and cracks. Journal of Applied Mechanics, 35:379-386. Siemens, 2019. Multi- step nonlinear user’s guide (SOL 401 and SOL 402). Sourisseau, Q., 2022a. Development of a robust methodology for the design assessment of bonded reinforcements on steel structures: Use of cohesive zone model and distributed optical fiber for characterization. Engineering Sciences, PhD Thesis. Nantes Université. Sourisseau, Q., Lepretre, E., Chataigner, S., Chapeleau, X., Mouton, L., Paboeuf, S., 2022b. Use of high spatial resolution optical fiber to monitor crack propagation of an adhesively bonded joint during ENF and DCB tests. International Journal of Adhesion and Adhesives, 115. Sourisseau, Q., Deydier, M., Paboeuf, S., Lepretre, E., Chataigner, S., Chapeleau, X., 2023. Development of composite patch for offshore steel repair. Proceedings of the International Conference on Durability, Maintenance and Repair of Structures, DRMS. Zhao, X.L., Zhang, L., 2007. State-of-the-art review on FRP strengthened steel structures. Engineering Structures, 29(8):1808-1823.