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Ultimate strength characteristics of aluminium plates for high speed vessels

Lookup NU author(s): Dr Simon Benson, Dr Jonathan Downes, Professor Bob Dow

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Abstract

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.


Publication metadata

Author(s): Benson S, Downes J, Dow RS

Publication type: Article

Journal: Ships and Offshore Structures

Year: 2011

Volume: 6

Issue: 1-2

Pages: 67-80

Print publication date: 01/03/2011

ISSN (print): 1744-5302

ISSN (electronic): 1754-212X

Publisher: Taylor & Francis Ltd.

URL: http://dx.doi.org/10.1080/17445302.2010.529696

DOI: 10.1080/17445302.2010.529696


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