PSI - Issue 38

ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 38 (2022) 238–250

© 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 the scientific committee of the Fatigue Design 2021 Organizers For the time being there is – to our knowledge - no S-N curve for structural bonded reinforcements. Full scale coupon specimen fatigue tests of the structural bonded reinforcements were conducted by COLD PAD, third-partied by Bureau Veritas and in collaboration with two laboratories (private and public) in order to study the adhesive fatigue. Statistical analysis was performed according to international standards. The resulting S-N curve is fit for industrial fatigue design. It demonstrates a comfortable fatigue strength (S-N curve presenting a slope of 9). This paper presents the results of a fatigue life assessment campaign of COLDSHIELD including the experimental setup, the fatigue test results, and the numerical analyses. It details the reason why the design is compatible with a stress-based approach. It also explains the conclusions that can be derived in terms of fatigue life for a deck repair campaign. © 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 the scientific committee of the Fatigue Design 2021 Organizers Keywords: fatigue life; bonded assembly; repair; COLDSHIELD; structural maintenance; innovation; S-N curve; statistical analysis; reliability. COLDSHIELD, a co-development between COLD PAD, TOTAL and IFP Energies nouvelles, has been set up to meet this very ch lleng . This CLASS approved innovative alternative to “crop and re ew” stops the corrosion and restores hull strength. Among the steps to be take t demons rate hat such e air can be considered as perma e t, it was mandatory to characterize the fatigue behavior of this reinforcement solution. For the time being there is – to our knowledge - no S-N curve for structural bonded reinforcements. Full scale c upon specim n fatigu te ts of the structural bonded reinforcements were conducte by COLD PAD, third-partied by Bureau Veritas and in collaboration with two laboratories (private and publi ) in order to study e adhes ve fatig e. Statistic l analysis was performed according to international st ards. The resulting S-N curv is fit for industrial f tigue design. It demonstrates a comfortable fatigue stre gth (S-N curve pres nting a slope of 9). This paper presents the results of a fatigue life assessment campaign of COLDSHIELD including the experimental setup, th fatigue est results, and the numerical analys s. It details the reason why the design s compatible with a tress-based approach. It a so explains the conclusions that can be deriv d in terms of fatigue life for a deck repair campaign. © 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 the scientific committee of the Fatigue Design 2021 Organizers Keywords: fatigue life; bonded assembly; repair; COLDSHIELD; structural maintenance; innovation; S-N curve; statistical analysis; reliability. FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design FATIGUE OF ADHESIVE BONDING: WORLD FIRST FATIGUE S-N CURVE FOR FPSO APPLICATION Hamza Abbad El Andaloussi a , Luc Mouton b , Firas Sayed Ahmad c , Xabier Errotabehere d , Stéphanie Mahérault-Mougin e , Stéphane Paboeuf f a Naval architect, COLD PAD, Paris, 75 015, France b Bureau Veritas, Nantes, 44 300, France c Lead Experimental and Numerical simulations, COLD PAD, Paris, 75 015, France d Chief Technical Officer, COLD PAD, Paris, 75 015, France FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design FATIGUE OF ADHESIVE BONDING: WORLD FIRST FATIGUE S-N CURVE FOR FPSO APPLICATION Hamza Abbad El Andaloussi a , Luc Mouton b , Firas Sayed Ahmad c , Xabier Errotabehere d , Stéphanie Mahérault-Mougin e , téphane Paboeuf f a Naval architect, COLD PAD, Paris, 75 015, France b Bureau Veritas, Nantes, 44 300, France c Lead Experimental and Numerical simulations, COLD PAD, Paris, 75 015, France d Chief Technical Officer, COLD PAD, Paris, 75 015, France Abstract The ageing FPSOs (>10 years) induces frequent and costly structural maintenance operations in hazardous environment. The challenge is to perform these offshore structural mainten c operations with no production disruption while maximizing safety even for most tressed areas such s a mid-ship deck plating. e Bureau Veritas, La Défense, 92 800, France f Bureau Veritas, Nantes, 44 300, France e Bureau Veritas, La Défense, 92 800, France f Bureau Veritas, Nantes, 44 300, France Abstract The ageing FPSOs (>10 years) induces frequent and costly structural maintenance operations in hazardous environment. The challenge is to perform these offshore structural maintenance operations with no production disruption while maximizing safety even for the most stressed areas such as a mid-ship deck plating. COLDSHIELD, a co-development between COLD PAD, TOTAL and IFP Energies nouvelles, has been set up to meet this very challenge. This CLASS approved innovative alternative to “crop and renew” stops the corrosion and restores hull strength. Among the steps to be taken to demonstrate that such repair can be considered as permanent, it was mandatory to characterize the fatigue behavior of this reinforcement solution.

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 the scientific committee of the Fatigue Design 2021 Organizers 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 u der responsibility of t e scientific committee of the Fatigue Design 2021 Organizers

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 the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.025