Investigation on the Formation Mechanism of Natural Fragments of Improvised Explosive Device

Abstract

To study the key technical issues involved in the field of reconstruction of improvised explosive devices (IEDs), the formation mechanism of natural fragmentation under blast loading was investigated using the finite element code AUTODYN 3D with Mott’s stochastic failure model. The analysis of structural response, critical failure condition, as well as dispersion characteristics including initial angle and velocity of fragments were also carried out. Meanwhile, the effects of charge mass and structure were discussed. The results of the mass and number of fragments, as well as the radius of flight can be used to reconstruct the explosion scene of IEDs.