Numerical research on metal fragment scattering characteristics in pipe bomb configurations

DOI:	10.11809/bqzbgcxb2025.02.015
Keywords:	pipe bomb; fragment; detonation driven; special distribution; numerical simulation
Abstract:	In order to study the spatial distribution and initial velocity of fragments of pipe bombs under different kinds of charges, the numerical simulation calculations of the pipe body driven by detonation under typical charges such as TNT, COMP B, ANFO and TATP were carried out by comparing the initial velocity of fragments derived from Gurney formula and comparing with nonlinear dynamics software LS DYNA. The error analysis of theoretical analysis and simulation results were carried out to verify the effectiveness of numerical simulation, and the scattering characteristics of fragments of pipe bombs driven by detonation were analyzed. The results showed that the final form of fragments produced by pipe bomb explosion was greatly influenced by the type of charge, and the volume and mass of fragments produced by explosives with higher power and fierceness were lower than those produced by explosives with lower power and fierceness. The fragments spatial distributions of pipe bomb were quite different in axial and radial directions, and the number and mass of axial fragments at both ends were much lower than those in the radial direction of the pipe. Under the same charge volume, the initial velocities of fragments produced by different kinds of explosives were quite different. The research results provided a reference for the mitigation, case investigation, trace investigation and material evidence identification of pipe bombs.
Issue:	Vol. 46 No. 2 (2025)
Published:	2025-02-28
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