Characterization of the Natural Fragmentation of Explosive Ordnance Using the Numerical Techniques Based on the FEM

 

Marinko Ugrčić

Miodrag Ivanišević

 

The presented new methodology for full numerical simulating performances of casing rupture integrates the finite element method and the stochastic failure theory in the solvers for 2D and 3D axis-symmetric analyses of the projectile fragmentation. This paper focuses on the effects of the type of casing on the fragmentation characteristics. In this way, the selected specimen considers three specific types of high explosive (HE) items: 105 mm HE projectile M1, 120 mm HE mortar shell M62 and 128 mm HE missile warhead M63. As well, the presented technique makes it possible to consider the effects of the mechanical properties of the casing material and explosive type on the fragmentation. The results of numerical simulation and some relevant experimental data are used for their comparative analysis and evaluation of the numerical approach, confirming the computed parameters of fragmentation predict properly the characteristics of the natural casing disruption.

Key words: high explosive projectile, projectile fragmentation, numerical simulation, finite element method.