Williams B. W., Worswick M. J., D'Amours Guillaume, Rahem Ahmed et Mayer R.. (2010). Influence of forming effects on the axial crush response of hydroformed aluminum alloy tubes. International Journal of Impact Engineering, 37, (10), p. 1008-1020.
URL officielle: http://dx.doi.org/doi:10.1016/j.ijimpeng.2010.04.0...
The impact behaviour of tubular hydroformed axial crush tubes is examined. The results of dynamic axial crush tests performed with both non-hydroformed and hydroformed AA5754 aluminum alloy tubes were compared to predictions from finite element models. Explicit dynamic finite element simulations of the hydroforming and crash events were carried out with particular attention to the transfer of forming history from the hydroforming simulations to the crash models. The values of tube thickness, work hardening, and residual stresses at the end of the hydroforming simulations were used as the initial state for the crash models. In general, simulations performed using the von Mises yield criterion with isotropic material behaviour gave reasonable predictions when compared to experimental data. It was found that it was important to account for the forming history of the hydroforming operation in the axial crush models. The results showed that work hardening resulting from hydroforming is beneficial to increasing the energy absorption during crash, whereas thickness reduction decreased the energy absorption. Residual stresses had little effect on the energy absorption characteristics. It was also shown that the energy absorption characteristics of tubes with the same mass could vary greatly by adjusting the geometry of the tube and the amount of work hardening experienced by the tube during hydroforming.
|Type de document:||Article publié dans une revue avec comité d'évaluation|
|Version évaluée par les pairs:||Oui|
|Sujets:||Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique|
|Département, module, service et unité de recherche:||Départements et modules > Département des sciences appliquées > Module d'ingénierie|
|Mots-clés:||Aluminum, axial crush, energy absorption, hydroforming|
|Déposé le:||09 juin 2016 17:50|
|Dernière modification:||09 déc. 2016 14:44|
Éditer le document (administrateurs uniquement)