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Publications
Gaspar, B., Teixeira, A.P. and Guedes Soares, C. (2015), “Effect of the aspect ratio on the ultimate compressive strength of plate elements with non-uniform corrosion”, Analysis and Design of Marine Structures, Guedes Soares, C. & Shenoi R.A. (Eds.), Taylor & Francis, London, UK, pp. 765-774, 2015
An analysis of the ultimate strength of plate elements under uniaxial compression with non-uniform corrosion patterns is presented. The aim is to evaluate the influence of the aspect ratio of the plate elements on their ultimate compressive strength reduction due to the effect of the non-uniform corrosion patterns. The non-uniform reduction of thickness of the corroded plate elements is represented by random fields, which the statistical properties are described by a nonlinear time-dependent corrosion wastage model fitted to actual corrosion depth measurements in ship plate elements. The ultimate compressive strength of the plate elements is predicted through nonlinear finite element analysis for each realization of the random field of corrosion using Monte Carlo simulation. The practical importance of the non-uniform corrosion patterns on the ultimate strength assessment of plate elements is evaluated as a function of the aspect ratio and slenderness parameters and correlation length of the random field of corrosion. It is shown that the ultimate compressive strength reduction due to the effect of the non-uniform corrosion patterns is particularly significant in the case of rectangular plate elements with aspect ratios typical of the longitudinal structures of the ship hull girder.
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