PSI - Issue 42

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 42 (2022) 793–798

© 2022 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 23 European Conference on Fracture – ECF23 Abstract Failure and fatigue life prediction becomes more important for design of composite marine vessels and structures as their application as constructive material increases. Harsh environmental operational conditions have a great impact on such structures. Realistic environmental input parameters for structural modeling of marine structures are crucial and can be obtained by conducting tests in real sea environment for prolonged periods, as opposed to usual accelerated laboratory experiments. The needed changes in the approach to the modelling of S-N curves for composite materials prescribed by the Classification societies, considering the material properties degradation due to the effects of water absorption, fouling marine organisms and prolonged exposure to the marine environment are discussed here. Regression analysis results for experimental data collected during a 2-year period are presented and a procedure for the decrease estimation of expected fatigue life is given for glass/polyester composite material for three different fiber layout configurations. All the submerged coupons with different fiber layout configuration exhibited a significant loss of ultimate tensile strength (UTS) which consequently shortened their fatigue life and decreased durability. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Fatigue life; Composites; Marine environment 23 European Conference on Fracture - ECF23 Environmentally induced changes in fatigue life and durability of marine structures and vessels Goran Vizentin a, * , Goran Vukelić a,b , Željko Božić c , Špiro Ivošević d a University of Rijeka, Faculty of Maritime Studies, Marine Engineering Department, Studentska 2, Rijeka HR51000, Croatia b University of Rijeka, Faculty of Maritime Studies, Center for Marine Technologies, M. Baraca 18, Rijeka HR51000, Croatia c University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, I. Lucica 5, Zagreb HR10000, Croatia d University of Montenegro, Fa Faculty of Maritime Studies, Dobrota 36, Kotor 85330, Montenegro Goran Vizentin a, * , Goran

* Corresponding author. Tel.: +385 51 338 411; fax: +385 51 336 755. E-mail address: goran.vizentin@pfri.uniri.hr

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 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 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.100