A Comparative Study on Fatigue Life Optimization of the Intersection between a Longitudinal and a Webframe

Martin Birk-Sørensen

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    Abstract

    The connection between longitudinals and transverse web frames, is a weak point in the fatigue strength of a ship structure. Moreover it is very expensive to repair fatigue damages in these intersections, and a fatigue analysis for a specific detail was therefore carried out in order to seek to improve the design. A new improved slot for the longitudinal intersection in the web plate is found on the basis of a shape optimization of the conventional slot. The new slot has an unique shape (tongue form) resulting in a stress relaxation around the slot. Both the conventional and the new slot structure were analyzed by FEM followed by fatigue life calculations and subsequently compared. The overall expected fatigue life for the shape optimized slot will increase by approximately 12 %. The results were compared with an another study concerning a slot for a T-longitudinal.
    Original languageEnglish
    Title of host publicationProceedings of International Conference on Fatigue of Welded Components and Structures
    Place of PublicationFrance
    PublisherLes Éditions de Physique
    Publication date1996
    Pages33-40
    Publication statusPublished - 1996
    EventInternational Conference on Fatigue of Welded Components and Structures - Senlis, France
    Duration: 1 Jan 1996 → …

    Conference

    ConferenceInternational Conference on Fatigue of Welded Components and Structures
    CountryFrance
    CitySenlis
    Period01/01/1996 → …

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