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Advanced numerical modelling for predicting residual compressive strength of corroded stiffened plates
https://orcid.org/0000-0001-7308-2586
Abstract An advanced methodology for predicting the residual compressive strength of corroded stiffened plates is developed here using the non-linear finite element method. The non-uniform loss of a plate thickness is accounted for on a macro-scale. In contrast, mechanical properties are changed using the constitutive model to reflect the corrosion degradation impact on a micro-scale. Three different stiffened plate thicknesses are considered, and ultimate compressive capacity is analysed for different severity of corrosion degradation. First, the deterministic analysis is performed, and numerical results are validated against the experiment. Then, the corrosion fields are modelled with the use of random fields. Different statistical characteristics of the generated random fields are investigated to identify their impact on the resulting structural behaviour. It was found that severe corrosion degradation could cause an excessive reduction of structural capacity even at 50%. Finally, the results of the present study are compared with the already studied corrosion models showing a highly non-conservative solution of the latter, where the plate thickness is reduced only due to the corrosion degradation progress.
Highlights Advanced numerical modelling of compressed corroded stiffened plates is proposed. Non-uniform thickness distribution with variation in material properties is considered. Deterministic analysis is performed and results are validated with experiment. Second approach employs random field modelling to account for non-uniform thickness. Consideration of uniform thickness loss significantly overestimate ultimate strength.
Advanced numerical modelling for predicting residual compressive strength of corroded stiffened plates
https://orcid.org/0000-0001-7308-2586
Abstract An advanced methodology for predicting the residual compressive strength of corroded stiffened plates is developed here using the non-linear finite element method. The non-uniform loss of a plate thickness is accounted for on a macro-scale. In contrast, mechanical properties are changed using the constitutive model to reflect the corrosion degradation impact on a micro-scale. Three different stiffened plate thicknesses are considered, and ultimate compressive capacity is analysed for different severity of corrosion degradation. First, the deterministic analysis is performed, and numerical results are validated against the experiment. Then, the corrosion fields are modelled with the use of random fields. Different statistical characteristics of the generated random fields are investigated to identify their impact on the resulting structural behaviour. It was found that severe corrosion degradation could cause an excessive reduction of structural capacity even at 50%. Finally, the results of the present study are compared with the already studied corrosion models showing a highly non-conservative solution of the latter, where the plate thickness is reduced only due to the corrosion degradation progress.
Highlights Advanced numerical modelling of compressed corroded stiffened plates is proposed. Non-uniform thickness distribution with variation in material properties is considered. Deterministic analysis is performed and results are validated with experiment. Second approach employs random field modelling to account for non-uniform thickness. Consideration of uniform thickness loss significantly overestimate ultimate strength.
Advanced numerical modelling for predicting residual compressive strength of corroded stiffened plates
https://orcid.org/0000-0001-7308-2586
Abstract An advanced methodology for predicting the residual compressive strength of corroded stiffened plates is developed here using the non-linear finite element method. The non-uniform loss of a plate thickness is accounted for on a macro-scale. In contrast, mechanical properties are changed using the constitutive model to reflect the corrosion degradation impact on a micro-scale. Three different stiffened plate thicknesses are considered, and ultimate compressive capacity is analysed for different severity of corrosion degradation. First, the deterministic analysis is performed, and numerical results are validated against the experiment. Then, the corrosion fields are modelled with the use of random fields. Different statistical characteristics of the generated random fields are investigated to identify their impact on the resulting structural behaviour. It was found that severe corrosion degradation could cause an excessive reduction of structural capacity even at 50%. Finally, the results of the present study are compared with the already studied corrosion models showing a highly non-conservative solution of the latter, where the plate thickness is reduced only due to the corrosion degradation progress.
Highlights Advanced numerical modelling of compressed corroded stiffened plates is proposed. Non-uniform thickness distribution with variation in material properties is considered. Deterministic analysis is performed and results are validated with experiment. Second approach employs random field modelling to account for non-uniform thickness. Consideration of uniform thickness loss significantly overestimate ultimate strength.
Advanced numerical modelling for predicting residual compressive strength of corroded stiffened plates
Woloszyk, Krzysztof (Autor:in) / Garbatov, Yordan (Autor:in)
Thin-Walled Structures ; 183
17.11.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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