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Effects of mesh size and remapping on the predicted crash response of hydroformed tubes

D'Amours Guillaume, Rahem Ahmed, Mayer Robert, Williams Bruce et Worswick Michael. (2007). Effects of mesh size and remapping on the predicted crash response of hydroformed tubes. Dans : The 6th European LS-DYNA Users' Conference , May 2007, Gothenburg, Sweden.

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Résumé

Crashworthiness simulations can be useful tools in vehicle design. According to Du Bois [1], there are many factors which affect the reliability of crashworthiness models. Especially, the mesh size and the mapping of forming results into crash models. Few studies have analyzed the mesh size effect with forming results on the crashworthiness of frame components. This paper presents an analysis of crush response of hydroformed aluminium tubes from both experiments and finite element simulations. The predicted crush response for tubes meshed with different mesh sizes for hydroforming with results transferred to the crash simulations will be firstly shown. Predicted mean crush forces will be compared to measured ones. Thereafter, forming results were remapped on a secondary model, having coarser mesh sizes for crush simulations, with the LS-DYNA option called *INCLUDE_STAMPED_PART. Results show that in certain instances, it may be better to use a fine mesh size for the hydroforming models and remap forming results to coarser mesh sizes for crashworthiness models to save computational time.

Type de document:Matériel de conférence (Non spécifié)
Date:Mai 2007
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie civil
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
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Mots-clés:crashworthiness, crush, energy absorption, crush force, remapping, hydroforming, aluminium, mesh size, résistance à l'écrasement, écrasement, absorption d'énergie, force d'écrasement, remappage, hydroformage, aluminium, maillage
Déposé le:02 mars 2021 21:17
Dernière modification:02 mars 2021 21:17
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