PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

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Procedia Structural Integrity 64 (2024) 893–900

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Use of equivalent interface samples during fracture mechanics investigations for the design of adhesively bonded composite reinforcements on steel structures Quentin Sourisseau a,c , Emilie Lepretre a , Xavier Chapeleau b , Sylvain Chataigner a *, Stephane Paboeuf c , Maxime Deydier c a MAST/SMC, Université Gustave Eiffel, 44344 Bouguenais, France Abstract During an international Joint Industry Project called SBO (Strength Bond Offshore), a design strategy of adhesively bonded composite reinforcements for steel structures was developed and assessed. It relied on the use of fracture mechanics. Yet, an adaptation of the characterization tests was needed to reduce the number of samples while remaining representative of the studied reinforcement. This adaptation was called “equivalent interface samples”. This paper aims at presenting the proposed adaptation of fracture mechanics tests for mode I, mode II and mixed mode, and its use during the design strategy. First, the geometry of the samples will be presented. Then, the obtained results during the fracture mechanics experimental campaign will be introduced. Those investigations relied on the use distributed optical fiber sensor to monitor the crack propagation during the tests. The obtained toughness characterizations allowed us proposing a design strategy that was assessed in regards with experimental tests conducted on large size steel samples reinforced with adhesively bonded composite. © 2024 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 SMAR 2024 Organizers Keywords: Adhesively bonded composite reinforcement; Steel structures; Fracture mechanics; Equivalent interface SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Use of equivalent interface samples during fracture mechanics investigations for the design of adhesively bonded composite reinforcements on steel structures Quentin Sourisseau a,c , Emilie Lepretre a , Xavier Chapeleau b , Sylvain Chataigner a *, Stephane Paboeuf c , Maxime Deydier c a MAST/SMC, Université Gustave Eiffel, 44344 Bouguenais, France b COSYS/SII-I4S, Université Gustave Eiffel, Inria, 44344 Bouguenais, France c Bureau Veritas, 4 Rue Duguay Trouin, 44818 Saint Herblain, France Abstract During an international Joint Industry Project called SBO (Strength Bond Offshore), a design strategy of adhesively bonded composite reinforcements for steel structures was developed and assessed. It relied on the use of fracture mechanics. Yet, an adaptation of the characterization tests was needed to reduce the number of samples while remaining representative of the studied reinforcement. This adaptation was called “equivalent interface samples”. This paper aims at presenting the proposed adaptation of fracture mechanics tests for mode I, mode II and mixed mode, and its use during the design strategy. First, the geometry of the samples will be presented. Then, the obtained results during the fracture mechanics experimental campaign will be introduced. Those investigations relied on the use distributed optical fiber sensor to monitor the crack propagation during the tests. The obtained toughness characterizations allowed us proposing a design strategy that was assessed in regards with experimental tests conducted on large size steel samples reinforced with adhesively bonded composite. © 2024 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 SMAR 2024 Organizers Keywords: Adhesively bonded composite reinforcement; Steel structures; Fracture mechanics; Equivalent interface © 2024 The Authors. Published by Elsevier B.V. Peer-review under responsibility of SMAR 2024 Organizers b COSYS/SII-I4S, Université Gustave Eiffel, Inria, 44344 Bouguenais, France c Bureau Veritas, 4 Rue Duguay Trouin, 44818 Saint Herblain, France

* Corresponding author. Tel.: 0033 (0)2 40 84 56 57 E-mail address: sylvain.chataigner@univ-eiffel.fr * Corresponding author. Tel.: 0033 (0)2 40 84 56 57 E-mail address: sylvain.chataigner@univ-eiffel.fr

2452-3216 © 2024 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 SMAR 2024 Organizers 2452-3216 © 2024 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 SMAR 2024 Organizers

2452-3216 © 2024 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 SMAR 2024 Organizers 10.1016/j.prostr.2024.09.364