The most lethal behind-armour effect, in the case of EFP attack, is often considered to be Behind-Armour Debris (BAD): the nature and extent of which will determine the nature of damage within the target itself. One method of modelling BAD is the use of hydrocodes - both Eulerian and Lagrangian hydrocodes having been used in the past as a method of modelling BAD formation and dispersal. This report will aim to show how Smooth Particle Hydrodynamics (SPH) can offer significant advantages over such traditional methodologies. A series of experimental firings conducted at the TNO test facility in the Netherlands is used as a basis for the work, which includes both 2D and 3D SPH models. The accuracy of these models is discussed, with particular regard to their ability to predict target hole diameter and BAD dispersion. A range of issues surrounding the use of SPH as a predictive tool is also addressed.
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