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Theses

Modélisation numérique du procédé de planage des bandes minces

Abstract : Leveling is a forming process used in the aluminum industry in order to correct flatness defects and minimize residual stresses in thin metallic strips thanks to bending under tension. After testing an analytical model of multiroll leveling and raising the limits of this approach, this thesis manuscript introduces a three-dimensionnal Finite Element model to simulate the sheet conveying in an industrial configuration of stretcher. It can compute plastic strains and residual stresses through width and thickness. Initial flatness defetcs are taken into account in the entering strip and we verify how they are corrected at the exit. Then, to reduce model size and computation time, a second approach with two elementary configurations coupling and data transfer is compared to whole model of stretcher. This alternative model is applied to study the profiled rolls effect. Finally, it predicts the deformed strip after springback and potential buckling phenomena
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https://hal.univ-lorraine.fr/tel-01749068
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Submitted on : Thursday, March 29, 2018 - 12:00:15 PM
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  • HAL Id : tel-01749068, version 1

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Norman Mathieu. Modélisation numérique du procédé de planage des bandes minces. Autre. Université Paul Verlaine - Metz, 2011. Français. ⟨NNT : 2011METZ026S⟩. ⟨tel-01749068⟩

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