Abstract
We present a numerical method to optimize the age creep process for the manufacturing of spatial structures. In particular, we study the forming of Ariane 5 bulkheads. They are obtained by assembling eight segments which have to be a portion of sphere. Each one is formed by blowing a sheet against a die following a predetermined thermo-mechanical cycle (temperature and pressure). To take into account viscoplastic strains we have identified a non-isothermal Chaboche-Lemaître model.
The process optimization is done through iterative computations using ABAQUS software. It consists in the minimization of the gap between the deformed sheet and the final shape required and the cumulated plastic strain minimization. The optimization parameters define the shape and the thickness distribution of the undeformed sheet and the die geometry. Our numerical model enables to obtain a configuration that respects industrial specifications (geometry and toughness).
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References
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© 1999 Springer Science+Business Media Dordrecht
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Bourdin, JP., Bonnafé, JP., Delmotte, J., Grosjean, E., Roelandt, JM. (1999). Shape and Thickness Optimization of an Aeronautical Structure Manufactured Using Age Creep Forming Process. In: Batoz, JL., Chedmail, P., Cognet, G., Fortin, C. (eds) Integrated Design and Manufacturing in Mechanical Engineering ’98. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9198-0_39
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DOI: https://doi.org/10.1007/978-94-015-9198-0_39
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5342-8
Online ISBN: 978-94-015-9198-0
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