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Probabilistic modelling of the ultimate strength of ship plates with non-uniform corrosion

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Abstract

This paper presents the results of a parametric study of probabilistic modelling of the ultimate strength of ship plates with non-uniform corrosion represented by random fields. The load-shortening behaviour of the plates with non-uniform reduction of thickness due to corrosion under longitudinal compression is obtained using a general-purpose nonlinear finite element analysis program. A nonlinear time-dependent corrosion model is used to define the probabilistic characteristics of the random fields based on corrosion data measured in plate elements at different locations of bulk carriers. Based on the probabilistic models derived by Monte Carlo simulation, equations to predict the mean and the 5 % characteristic value of the ultimate strength of plates with non-uniform corrosion are developed. Finally a regression equation is proposed to take into account the effect of non-uniform corrosion patterns in the predictions of the ultimate strength of plates with uniform corrosion.

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Acknowledgments

This work has been funded by the American Bureau of Shipping under the projects “Condition Assessment of Ageing Ship Structures” and “Time-variant Reliability of Hull Structures”. The authors are grateful to the reviewer’s valuable comments that improved the manuscript.

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Correspondence to C. Guedes Soares.

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Teixeira, A.P., Guedes Soares, C. & Wang, G. Probabilistic modelling of the ultimate strength of ship plates with non-uniform corrosion. J Mar Sci Technol 18, 115–132 (2013). https://doi.org/10.1007/s00773-012-0197-7

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  • DOI: https://doi.org/10.1007/s00773-012-0197-7

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