Numéro |
J. Phys. IV France
Volume 110, September 2003
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Page(s) | 329 - 334 | |
DOI | https://doi.org/10.1051/jp4:20020715 |
J. Phys. IV France 110 (2003) 329
DOI: 10.1051/jp4:20020715
Impact tension of sheet metals - Effect of initial specimen length
A. Rusinek and J.R. KlepaczkoLaboratory of Physics and Mechanics of Materials, Université de Metz, Ile du Saulcy, 57045 Metz, France
Abstract
It is well known that a specimen for impact testing of materials must be optimized concerning its dimensions. The main reason
is to reduce strain gradients due to the effects of elastic-plastic wave propagation. On the other hand, when Split Hopkinson
Bar (SHB) is applied for tension test, the net displacement of the specimen ends is very limited, usually from 2.0 to 3.0 mm.
Thus, to reach maximum strain 0.5 the specimen length must be reduced to dimensions from 4.0 mm to 6.0 mm. Consequently small
diameter, or lateral dimensions in case of flat specimen, must be applied to assure one-dimensional deformation. Such small
lengths substantially perturb the real material behavior to be determined. So the main motivation of this study was to perform
a systematic analysis, numerical and analytical, to find differences in behavior of short and long specimens loaded in impact
tension. The FE code Abaqus/Explicit has been used to simulate several specimen lengths from 10 mm to 40 mm, and several velocities
from 10 m/s to 100 m/s.
© EDP Sciences 2003