| Numéro |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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|---|---|---|
| Page(s) | 1287 - 1293 | |
| DOI | https://doi.org/10.1051/jp4:2006134195 | |
| Publié en ligne | 26 juillet 2006 | |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1287-1293
DOI: 10.1051/jp4:2006134195
Influence of the strain path on crash properties of a crash-box structure by experimental and numerical approaches
L. Durrenberger1, D. Even2, A. Molinari1 and A. Rusinek11 Laboratory of Physics and Mechanics of Materials, UMR CNRS 75-54, University of Metz, Île du Saulcy, 57045 Metz Cedex, France
2 Arcelor Research, Voie Romaine, BP. 30320, 57283 Maizières les Metz, France
Published online: 26 July 2006
Abstract
In order to reduce the gas emission without decreasing
the passengers safety, the UHSS (Ultra High Strength Steel) steels are more
and more used in the automotive industry. The very high mechanical
characteristics of these steels allow to reduce the car weight thanks to the
thickness reduction of the structure parts. The aim of this study is to
analyse the plastic pre-strain effect (forming) on the crash properties of a
crash-box structure. In order to achieve this goal, experimental rheological
tests have been performed by combining quasi-static tensile tests followed
by dynamic tensile test (
for a TRIP steel produced by ARCELOR. The combination of
these results allows to obtain a better understanding of the steel behaviour
in dynamic loading under different strain paths. All these information are
necessary for an efficient simulation of crash test by including a pertinent
material response. A special attention is given to the influence of the
previous forming process on the dynamical response of crash boxes.
© EDP Sciences 2006