Modelling of the shaped charge jet break-up

A new model for shaped charge jet break-up was devised. For this purpose, the fragments of a shaped charge jet were analyzed and their characteristics compared against the ones predicted by the break-up proposed by Pfeffer, Hirsch, Chou and Haugstad. As the predictions provided by these models are not fully satisfactory, the break-up process was analyzed in order to develop a new break-up model which provides a better estimation of the break-up time and the accumulated length of the jet. This model makes use of one parameter, the fragment shape index, which can be determined experimentally. This parameter characterizes the type of jet break-up (ductile or brittle) and is hence indicative of the jet quality.