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• W3112148648 endingPage "107316" @default.
• W3112148648 startingPage "107316" @default.
• W3112148648 abstract "Steel cylindrical shell structures such as silos and tanks are very sensitive to geometric imperfections and prone to a plastic instability failure known as elephant's foot (EF) buckling. This type of buckling arises under axial compression. The aim of this paper is to explore the plastic collapse response in conical shells with low semi-vertex angle values under compression. In a first step, the initial geometric imperfection shapes that dictate which plastic mechanisms arise were identified using finite element (FE) models. In a second step, a parametric study reported two plastic collapse mechanisms and showed that the elephant's foot plastic collapse mechanism is the most likely to appear in compressed conical shells with low d / t values, followed by the Yoshimura collapse mechanism, more common with larger d / t values. Finally, a practical model in which the parameters have been adjusted from numerical models has been derived for the elephant's foot plastic mechanism. This model provides the load-deformation behaviour of compressed conical shells at the post-collapse region. The load vs. end-shortening curves provided by the model have been validated through comparison with curves given by the FE models. The good agreement between the results proves the efficiency of the practical model to predict the collapse response of conical shells. • Different buckling categories have been obtained for two different thicknesses. • Sensitivity to imperfections has been analysed and different imperfection amplitudes have been considered. • Elephant foot mechanism is the most common failure that arises with small imperfections. • The Yoshimura mechanism mainly appears with large initial imperfections. • A model to define the compressive load vs. end-shortening displacement response for conical shells has been developed." @default.
• W3112148648 created "2020-12-21" @default.
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• W3112148648 date "2021-02-01" @default.
• W3112148648 modified "2023-09-30" @default.
• W3112148648 title "Practical approach to plastic collapse of conical shells under axial compression" @default.
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• W3112148648 doi "https://doi.org/10.1016/j.tws.2020.107316" @default.
• W3112148648 hasPublicationYear "2021" @default.
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