Document Type

Article

Language

eng

Publication Date

3-15-2008

Publisher

Elsevier

Source Publication

International Journal of Solids and Structures

Source ISSN

0020-7683

Abstract

Mesoscale calculations have been conducted in order to gain further insight into the dynamic compaction characteristics of granular ceramics. The primary goals of this work are to numerically determine the shock response of granular tungsten carbide and to assess the feasibility of using these results to construct the bulk material Hugoniot. Secondary goals include describing the averaged compaction wave behavior as well as characterizing wave front behavior such as the strain rate versus stress relationship and statistically describing the laterally induced velocity distribution. The mesoscale calculations were able to accurately reproduce the experimentally determined Hugoniot slope but under predicted the zero pressure shock speed by 12%. The averaged compaction wave demonstrated an initial transient stress followed by asymptotic behavior as a function of grain bed distance. The wave front dynamics demonstrate non-Gaussian compaction dynamics in the lateral velocity distribution and a power-law strain rate–stress relationship.

Comments

Accepted version. International Journal of Solids and Structures, Vol. 45, No. 6 (March 15, 2008): 1676-1696. DOI. © 2007 Elsevier Ltd. Used with permission.

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