Atomistic simulation of detonation initiation by ultra-short impact. (October 2015)

• Record Type: Journal Article
• Authors: Murzov, S A; Zhakhovsky, V V
• Is Part Of: Journal of physics. Number 653(2015)
• Publication Date: 2015-10
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/653/1/012056
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We present results of the classical molecular dynamics simulation of detonation initiation in simple AB model of a high explosive compressed by ultra-short shock wave (SW). The simplified reactive empirical bond order potential (REBO) defines interatomic forces in the AB model explosive made up of diatomic AB molecules. Simulation of ultra-short piston-driven compression of AB explosive with duration of picoseconds represents an indirect initiation via a thin metal foil irradiated by a femtosecond laser pulse. We studied transition of SW to a detonation wave (DW), including evolution of calculated pressure profile in a sample. A run distance to detonation of such AB explosive film, which is required for detonation initiation, was obtained. Variation of loading time and piston velocity gives a 2D region of transition from SW to DW. The influence of pores on detonation initiation threshold is discussed.