Numerical analysis on the initiation mechanism of the large walled charges impacted by energetic material penetrator

DOI:	10.11809/bqzbgcxb2025.02.017
Keywords:	energetic material; penetrator; impact detonation; charges kinetic energy
Abstract:	To study the impact detonation mechanism of the large walled charges impacted by the energetic material, a numerical simulation was carried out on the impact detonation of large walled PBX 09 charges by energetic material with different projectile diameters and projectile lengths based on the explicit dynamics simulation software AUTODYN 2D. The ‘up down method’ was adopted to obtain the threshold velocity and threshold specific kinetic energy of impact detonation of energetic materials in different conditions. The research results show that both the impact detonation threshold velocity and threshold specific kinetic energy of the energetic materials decrease as the projectile diameter increases (the projectile length is constant).when the projectile diameter is constant, the impact detonation threshold velocity of the energetic material projectile decreases as the projectile length increases to a certain extent, while the threshold specific kinetic energy tends to increase. The reactivity and pressure contours of the energetic material’s impact detonation simulation process reveal the impact detonation mechanism. In low velocity conditions, the detonation of large wall thickness charges is a shock wave detonation mechanism, while the charge is detonated due to the dual factors of shock waves and macro shear in high velocity conditions. The simulation study verified the feasibility of impact detonation of energetic material against targets with large walled charges and provided a design reference for attacking targets with large walled charges.
Issue:	Vol. 46 No. 2 (2025)
Published:	2025-02-28
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