Abstract
AbstractIn this paper, the cook‐off characteristics of NTO/HMX‐based plastic‐bonded explosives, here after referred to as JEO, with confined and pressure‐relief structures are investigated. Firstly, a pre‐ignition thermal decomposition model and a post‐ignition combustion model of the explosives were established. The chemical reaction kinetics and combustion reaction parameters in the numerical model were calibrated according to a small closed‐bomb experiment. The cook‐off process of the explosives was then studied by numerical simulation, determining the influence of different structures on the ignition time, ignition position, and reaction intensity of a JEO charge. The cook‐off of NTO/HMX‐based plastic‐bonded explosives with different structures was then experimentally studied, obtaining the temperature curve of each explosive, the deformation of the shell and liner, the macro‐reaction phenomena when the charge was ignited and the residue state after the reaction, which verified the validity of the numerical simulation.
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