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The closed form solution of the Darboux boundary value problem for backward driving of solids by the high explosive

Włodarczyk E.

Journal of Technical Physics

2001

Vol. 42, no 1

5-21

The closed form solution of the Darboux boundary value problem, which occurs at the backward driving solids by the condensed explosive, was obtained in this paper. The constructed solution may be used, among other cases, for estimating the explosively driven elements velocity of the casing and liner of the wedge hollow charge. The solution may be applied for evaluation of the explosive active part in the wedge shaped charge, too. These problems will be considered in the next paper.

Active mass of high explosive in the wedge-shaped charge

Włodarczyk E.

Journal of Technical Physics

2001

Vol. 42, no 2

149-164

The algebraic formulae, determining the active mass of the high explosive (HE) in the wedge-shaped charge warhead have been derived in the paper. Influences of the casing and liner inertia of the wedge cumulative warhead as well as of the liner shape on the active mass of the HE have been analysed. The presented simple formulae may be used by the engineers designing the shaped charges.

Confined explosions of high explosives

Trzciński W., Paszula J.

Journal of Technical Physics

2000

Vol. 41, no 4

453-470

In the present paper, effects of turbulent combustion of the detonation products of high explosives in confined explosions are studied. Explosions of TNT, TNT/RDX and the mixtures of these explosives with Al are investigated in a steel chamber of 150-liter volume. The chamber is filled with nitrogen or air under normal conditions. Overpressure histories are recorded at the chamber wall. The dependence of the mean overpressure on the loading density of TNT is determined. This dependence is used to determine the TNT equivalent of explosives tested for confined explosions. On the basis of the measured overpressure histories and the results of thermochemical calculations, the rate of energy release and final heat effects of combustion of the detonation products in air are also estimated. Finally, the degree of after-burning of the detonation products is calculated for explosive mixtures tested.

Brisance of the high explosives

Włodarczyk E.

Journal of Technical Physics

2000

Vol. 41, no 4

343-359

The essential survey of the literature data, concerning the brisance of high explosives (HE) has been made in this paper. It is confirmed that the quantitative criteria of the theoretical estimate of the HE brisance proposed in the scientific literature are based on several assumptions, which are contradictory to the real course of the explosion phenomenon, and therefore they are erroneous. These criteria must not be applicated in the engineering practice. The reflection process of the detonation wave from th inertial rigid partition was used in order to derive the new formula describing the relative brisance of the HE. Moreover, the brisance of numerous commercial explosives and the military ones has been analysed too. The results, presented in this paper, are confirmed by experimentally gained data.