Issue |
DYMAT 2009
Volume 2, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
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Page(s) | 1317 - 1323 | |
Section | Constitutive Modeling | |
DOI | https://doi.org/10.1051/dymat/2009186 | |
Published online | 15 September 2009 |
DOI: 10.1051/dymat/2009186
Equation of state of ductile granular materials
R.G. Kraus1, D.J. Chapman1, P.D. Church2, P. Gould2, I.G. Cullis2, R. Cornish2 and W.G. Proud11 SMF, Cavendish Laboratory, JJ Thomson Avenue, University of Cambridge, CB3 0HE, UK
2 QinetiQ, Fort Halstead, Sevenoaks, Kent TN 14 7BP, UK
Published online: 15 September 2009
Abstract
As part of an effort to improve the general understanding of ductile granular materials under shock wave loading we have performed a number of experiments to test their behaviour during an impact experiment. In particular, we have obtained wave profiles and determined the principle Hugoniot for 14% porous Aluminum in the stress range of 0.6–4.6 GPa. The Hugoniot data compare reasonably well with a Mie-Grüneisen equation of state. However, the wave profiles exhibit structure that suggests a relatively high yield strength and large dispersive properties, structure that a purely thermodynamic EOS cannot explain. The wave profiles themselves have been compared with numerical simulations using GRIM, the two-dimensional Eulerian hydrocode, and show relatively good agreement.
© EDP Sciences 2009