%0 Journal Article
%T Mechanisms of fragmentation of Al-W granular composites under dynamic loading
%A K. L. Olney
%A V. F. Nesterenko
%A D. J. Benson
%J Physics
%D 2012
%I arXiv
%R 10.1063/1.4711768
%X Numerical simulations of Aluminum (Al) and Tungsten (W) granular composite rings under various dynamic loading conditions caused by explosive loading were examined. Three competing mechanisms of fragmentation were observed: a continuum level mechanism generating large macrocracks described by the Grady-Kipp fragmentation mechanism, a mesoscale mechanism generating voids and microcracks near the initially unbonded Al/W interfaces due to tensile strains, and a mesoscale jetting due to the development of large velocity gradients between the W particles and adjacent Al. These mesoscale mechanisms can be used to tailor the size of the fragments by selecting an appropriate initial mesostructure for a given loading condition.
%U http://arxiv.org/abs/1202.3383v2