A survey of shaped-charge jet penetration models

Considerations about the Analytical Modelling of Shaped Charges

“…Due to the large number of targets which can be considered, the jet-target interaction modelling problem concerns a very large domain, with many specific aspects such as segmented jet penetration, compressible target materials, obliquity effects, reactive targets .... An extensive review and analysis of jet penetration models by Walters et al is to be found in Ref. 34 while Eichelberger(s51 gives an interesting look on the problem of analytically modelling the jet interaction with special target materials such as glass. In this paragraph, only two aspects of the jet-target interaction problem are discussed: the modelling of the penetration versus standoff curve of a jet into RHA, and the problem of predicting jet residual velocity after finite thickness plate perforation (RHA = rolled homogeneous amour).…”

A Modified Penetration Model for Copper-Tungsten Shaped Charge Jet with Non-Uniform Density Distribution

“…Equation 12 is called the DSM model (Dipersio, Simon and Merendino), which can also be used to obtain the exit velocity V P of a continuous jet after perforating a finite thickness (Ti) [2] and takes the form: (13) where V jex and V jin are the exit and the input jet tip velocities, respectively; and Copyright © 2016 Institute of Industrial Organic Chemistry, Poland T is the finite target thickness layer to be perforated. Equations 5-13 are well known as the extended hydrodynamic theory of a jet with non-uniform velocity distribution.…”

“…For a particulated jet, the Bernoulli equation cannot be used directly because the internal pressure cannot be supported when the jet is particulated [1]. Since this paper will only consider continuous jets, the interested reader is referred to [2] for the penetration models of particulated jets.…”

Effect of the static strength of a metal on long-rod penetration at low velocities

“…The static resistance o f a plastic medium to the penetration o f a long rod is a parameter widely used for evaluating the strength effect on penetration at high velocities [1][2][3][4][5][6][7]. This component of resistance to penetration and its association with the characteristics of a material, determining its mechanical behavior, is examined in a number o f publications [8][9][10][11].…”

“…This component of resistance to penetration and its association with the characteristics of a material, determining its mechanical behavior, is examined in a number o f publications [8][9][10][11]. However, various models of penetration, models of an elastoplastic material used for its simulation, and methods o f solution of mathematical equations resulted in different values of resistance and dimensions o f a plastic region [3,5,8,[11][12][13][14]. It will suffice to mention that the pressure at the interface at penetration is assumed to be equal to the pressure necessary for the expansion o f a cylindrical or spherical cavity in the unlimited volume o f a material, or to some intermediate value [13,15,16].…”