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Numerical assessment of ultimate strength of severe corroded stiffened plates

Abstract

The objective of this work is to investigate numerically (using the non-linear FEM and the approach stipulated by the Common Structural Rules) the severe nonuniform corrosion degradation effect on the ultimate strength of stiffened plates and compare the results to the already published experimental works. Different factors governing structural behavior of corroded stiffened plates are investigated, such as corrosion degradation level, material properties, initial imperfections and boundary conditions. The numerically estimated ultimate strength demonstrated to be very close to those observed during the experimental test. A sensitivity analysis with respect to the most important governing parameters of the numerical estimation of the ultimate strength is also performed and several conclusions are derived. The applied calculation procedure avoids using of a pitted surface of the corroded plates and instead of that an equivalent thickness is applying leading to a relatively fast and practical approach for ultimate trength assessment of corroded stiffened plates.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
ENGINEERING STRUCTURES no. 168, pages 346 - 354,
ISSN: 0141-0296
Language:
English
Publication year:
2018
Bibliographic description:
Wołoszyk K., Kahsin M., Garbatov Y.: Numerical assessment of ultimate strength of severe corroded stiffened plates// ENGINEERING STRUCTURES. -Vol. 168, (2018), s.346-354
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.engstruct.2018.04.085
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Gdańsk University of Technology

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