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 J. Kodvanj,Y. Garbatov,C. Guedes Soares,et al.Numerical Analysis of Stress Concentration in Non-uniformly Corroded Small-Scale Specimens[J].Journal of Marine Science and Application,2021,(1):1-9.[doi:10.1007/s11804-020-00154-2]
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Numerical Analysis of Stress Concentration in Non-uniformly Corroded Small-Scale Specimens


Numerical Analysis of Stress Concentration in Non-uniformly Corroded Small-Scale Specimens
J. Kodvanj1 Y. Garbatov2 C. Guedes Soares2 J. Parunov1
J. Kodvanj1 Y. Garbatov2 C. Guedes Soares2 J. Parunov1
1. Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, Croatia;
2. Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001. Lisbon, Portugal
Fatigue lifeFatigue testsCorrosionStress concentration factorsFinite element method
A numerical evaluation of stress concentrations of corroded plate surfaces of small-scale corroded steel specimens is compared with the experimentally estimated ones. Eleven specimens were cut from a steel box girder, which was initially corroded in real seawater conditions. The surface of all corroded specimens was analysed applying photogrammetry techniques, and a statistical description of an idealised corroded surface of each specimen was established. Fatigue lives of specimens are determined from the fatigue tests. Based on experimentally obtained fatigue lives, the stress concentration factors are calculated concerning the ideally smooth specimens. The correlation between the statistical parameters of the corroded specimen surfaces and the estimated stress concentration factors is analysed. Idealised corroded surfaces, converted in graphical format, are then used for the finite element modelling in ABAQUS software, and stress concentration factors are estimated from the finite element results. A convergence study is performed to determine the appropriate finite element mesh density. Comparison between experimentally obtained and numerically estimated stress concentration factors is performed as well as correlation analysis between actual and finite element predicted crack locations.


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Received date:2020-02-01;Accepted date:2020-06-06。
Foundation item:The work is supported by the Croatian Science Foundation within the projects IP-2013-11-8658 and lP-2019-04-2085. This work is also performed within the scope of the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering (CENTEC), which is financed by the Portuguese Foundation for Science and Technology (Fundação para a Ciência e Tecnologia - FCT) under contract UIDB/UIDP/00134/2020.
Corresponding author:Y. Garbatov
Last Update: 2021-06-10