Shape characterization and impact on the structural behavior of initially distorted, 4-mm thick ship-deck stiffened panels

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The shipbuilding industry aims at innovative design solutions for high-performing, lightweight structures. In cruise ship superstructures this translates, for example, into the design of thin-walled decks. Due to welding-induced, curved distortions, the fatigue life assessment of these structures cannot be based on the current fatigue design recommendations, which assume flat distortions. In this regard, this study investigates the panel plate field distortion shape and the stress concentration in the proximity of the weld by experiments and Geometrically Nonlinear Finite Element Analysis (GNL-FEA). Distortions are measured on 4-mm thick ship-deck panels, which are exposed to monotonic tensile test. The shape characterization considers the effect of structural continuity and boundary conditions, i.e., the cutting from the ship block and clamping of the panels in the test set-up. The numerical analysis highlights significant nonlinear secondary bending caused by curved distortions, despite acceptable misalignment amplitudes as defined in the current shipbuilding design standards.
Original languageEnglish
Title of host publicationAdvances in the analysis and design of marine structures
Subtitle of host publicationProceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023)
EditorsJ. W. Ringsberg, C. Guedes Soares
PublisherCRC Press
Number of pages9
ISBN (Electronic)978-1-003-39975-9
ISBN (Print)978-1-032-50636-4 , 978-1-032-50810-8
Publication statusPublished - 14 Apr 2023
MoE publication typeA4 Conference publication
EventInternational Conference on Marine Structures - Gothenburg, Sweden
Duration: 3 Apr 20235 Apr 2023
Conference number: 9

Publication series

NameProceedings in Marine Technology and Ocean Engineering
ISSN (Print)2638-647X
ISSN (Electronic)2638-6461


ConferenceInternational Conference on Marine Structures
Abbreviated titleMARSTRUCT


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