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Publications
Barbosa, A.A., Teixeira, A.P. and Guedes Soares, C. (2017), “Strength analysis of corroded pipelines subjected to internal pressure and bending moment”, Progress in the Analysis and Design of Marine Structures, Guedes Soares, C. & Garbatov Y. (Eds.), Taylor & Francis Group, London, UK, pp. 803-811
The burst pressure and the ultimate bending moment of intact and corroded pipes by non-linear is studied by finite element numerical calculations. The corrosion is defined as a local defect on the pipe surface, i.e., a region in which its wall thickness has a uniform reduction. First, a parametric study on the main dimensions of the corrosion defect is performed considering that the pipe is subjected only to internal pressure or bending moment. Then, numerical calculations are performed considering simultaneously the presence of internal pressure and an incremental bending load, which is applied until the pipe reaches the failure condition. The results obtained show that the presence of internal pressure significantly limits the ultimate bending moment of both corroded and non-corroded pipelines. This effect is proportional to the percentage of burst pressure applied initially and for the intact case, for instance, leads to a reduction of 30% of the bending moment capacity of the pipe obtained by single load numerical calculations.
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