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Influence of corrosion on the ultimate compressive strength of steel plates and stiffened panels
Affiliation:1. Southampton Marine and Maritime Institute, University of Southampton, Boldrewood Innovation Campus, Southampton SO16 7QF, UK;2. National Centre of Advanced Tribology at Southampton (nCATS), Engineering and the Environment, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK;1. Centre for Marine Technology and Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa 1049-001, Portugal;2. Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia;1. National Centre of Advanced Tribology at Southampton (nCATS) and Fluid Structure Interactions Research Group, University of Southampton, UK;2. National Centre of Advanced Tribology at Southampton (nCATS), University of Southampton, UK;3. Southampton Marine and Maritime Institute, University of Southampton, UK;1. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu Province, PR China;2. Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal;1. National Centre of Advanced Tribology at Southampton (nCATS), Faculty of Engineering and the Environment, Highfield Campus, University of Southampton, SO17 1BJ, UK;2. Southampton Marine and Maritime Institute, Boldrewood Innovation Campus, University of Southampton, SO16 7QF, UK
Abstract:This study concentrates on a comparison between steel plate and stiffened panels subject to localised corrosion. A finite element analysis is used to investigate the effect of random corrosion on the compressive strength capacity of marine structural units. Variables include the extent of corrosion; slenderness ratio and aspect ratio. A corrosion prediction model is incorporated to determine the thickness reduction with time. Corrosion-induced volume loss results in a greater reduction of ultimate strength for slender plates compared to stiffened panels, up to 45%, showing the structural element selection can strongly influence the accuracy of the estimated corrosion damage effect.
Keywords:Nonlinear finite element analysis  Ultimate strength  Pitting corrosion  Steel plate  Stiffened panel
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