A Correction for Ejection Angles of Fragments from Cylindrical Wareheads

Abstract

The problem of end effects influencing the ejection angles of fragments near the ends of cylindrical warheads is approached semi‐empirically. A correction term is added to the Taylor angle, based on the accepted concept that the reduced fragment velocities near the ends of a warhead are due to release waves in the detonation gas. Acceptable agreement between experiment and prediction is found for available experimental data. The results indicate that the accelerative drag due to the axially‐outward component of the release‐wave gas flow over the fragments dominates the divergence of the fragments for prefragmented casings, the axial pressure drop playing a minor part, while the reverse seems to be true for the divergence of fragments from solid casings.

Axial distribution of Fragment Velocities from cylindrical casing under explosive loading

“…It also evidenced that Equation (16) has a good agreement with fragment velocities distribution at two end parts of explosive-filled cylindrical sample in Ref. [16]. Thus, the new expression can predict the fragment velocities well for most simple conditions of explosively loaded cylinders.…”

“…11. It also evidenced that Equation (16) has a good agreement with fragment velocities distribution at two end parts of explosive-filled cylindrical sample in Ref. [16].…”

“…Danel and kazandjian [16] corrected the relationship between the detonation velocity of a charge and its Gurney energy at infinite expansion. Mohammad.…”

“…The structural parameters listed in Table 3 are substituted into Equation (16) and the calculated curve is shown as Fig. 10.…”

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

“…Next, we will talk about the new definition of the deflecting angle proposed in this paper. The performance of fragmentation structures is usually described with characteristics of the fragment dispersion and includes mass, ejection angle, direction angle, velocity, and the distribution density of fragments [22][23][24][25]. The ejection angle ( ) and direction angle (Ω), shown in Figure 11, are studied widely in designing fragmentation structures.…”