| 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) | 391 - 396 | |
| DOI | https://doi.org/10.1051/jp4:2006134060 | |
| Publié en ligne | 26 juillet 2006 | |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 391-396
DOI: 10.1051/jp4:2006134060
Strain-rate effects for high-strain-rate computations
G.R. Johnson1, T.J. Holmquist1, C.E. Anderson Jr.2 and A.E. Nicholls21 Network Computing Services, Inc., Minneapolis, MN 55415, USA
2 Southwest Research Institute, San Antonio, TX 78228, USA
Published online: 26 July 2006
Abstract
This paper examines the effect of strain rates for
computations involving high strain-rates, beyond 103 s - 1.
Although it is generally agreed that there is an enhanced rate effect at
these higher rates, there is uncertainty regarding the interpretation of
dynamic test data, the form of the high-rate effect, and the effect of the
high rates on practical problems of interest. This article provides an
assessment of the high-rate effect for Taylor (cylinder impact) tests, a
determination of high-rate constitutive model constants from the Taylor
tests, and the effect of the high-rate response on penetration computations.
The computations are performed with the Johnson-Cook constitutive model and
an enhanced (high-rate) form of the Johnson-Cook model.
© EDP Sciences 2006