Abstract
In accordance with the hot spot/initiation mechanism, the amendment of Perzyna's model of material behavior and elasto-viscoplastic analysis of explosive column due to impact are conducted in this paper. The flow parameter and Young's modulus are thought to be related with temperature. To test this developed model, the comparison between the experimental results and calculation values are done. The inhomogeneity of material is modeled by introducing a void at the center of the column. The numerical results show the elevated temperature near the voids. The effects of the shape and size of voids on local high temperature forming are also discussed.
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