The impact of corrosion-stress interactions on the topological features and ultimate strength of large-scale steel structures
| Autor: | Adam Sobey, Julian A. Wharton, Yikun Wang, Eko Charnius Ilman |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Mechanical Engineering 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Finite element method 0201 civil engineering Corrosion Stress (mechanics) 020303 mechanical engineering & transports 0203 mechanical engineering Buckling Ultimate tensile strength Coupling (piping) business Reduction (mathematics) Representation (mathematics) Civil and Structural Engineering |
| Zdroj: | Thin-Walled Structures. 157:107104 |
| ISSN: | 0263-8231 |
| DOI: | 10.1016/j.tws.2020.107104 |
| Popis: | Aged marine structural analysis often relies on simplified corrosion modelling. Empirical or statistical methods are used to predict a uniform thickness reduction over time. Although convenient, this approach cannot incorporate the corrosion evolution or the rough surfaces in the damaged area. This is fundamentally due to the lack of representation of the underlying corrosion mechanisms in service environments. To better understand how structural response changes based on corrosion under service loads, this paper presents a series of finite element analyses which consider the coupling relationship between the surface mechanical stresses and the resulting change of corrosion rate. The coupling provide complex corrosion-stress interaction depending on the experimental datasets. The quantification of this interaction is based on in situ experimental measurements of corrosion kinetics at different stress levels. The simulations show the stress effect results in the generation of more realistic corrosion patterns on the structural surface, based on a two-bay/two-span large-scale panel model subject to uniaxial compression. In addition, the incorporation of corrosion experiments allows the modelling of corrosion evolution based on physical observations instead of empirical assumptions. The irregular surface damage leads to a change in structural buckling mode, and up to 8% reduction in ultimate strength compared to models without considering the stress effect. |
| Databáze: | OpenAIRE |
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