Ultimate strength characteristics of aluminium plates for high speed vessels

  1. Lookup NU author(s)
  2. Dr Simon Benson
  3. Dr Jonathan Downes
  4. Professor Bob Dow
Author(s)Benson S, Downes J, Dow RS
Publication type Article
JournalShips and Offshore Structures
ISSN (print)1744-5302
ISSN (electronic)1754-212X
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Marine-grade aluminium alloy is an established structural material for medium- to high-speed commercial craft and has also been used as the primary hull material for several naval vessels. The analysis of large high-speed craft operating in deep ocean environments requires rigorous methodologies to evaluate the ultimate strength of the hull girders. Representative plate load-shortening curves form part of simplified hull girder ultimate strength methodologies; for the case of a high-speed aluminium vessel, the curves need to account for the effects of parameters including alloy type, geometric imperfection, softening in the heat-affected zone, residual stresses, lateral pressure and biaxial load. This paper examines the strength of a series of unstiffened aluminium plates with material and geometric parameters typical of the midship scantlings of a high-speed vessel, using a non-linear finite element approach. The parametric studies show that these factors can have a significant influence on the strength behaviour of the plates both prior to and after the collapse point has been attained.
PublisherTaylor & Francis Ltd.
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