scholarly journals Determination of detonation parameters for liquid high explosives

2012 ◽  
Author(s):  
Valentina Mochalova ◽  
Alexander Utkin
Keyword(s):  
High Explosives ◽  
Detonation Parameters ◽  
Liquid High Explosives

Determination of detonation parameters of liquid high explosives

2011 ◽  
Vol 5 (3) ◽  
pp. 513-518 ◽  
Author(s):  
A. V. Utkin ◽  
V. M. Mochalova ◽  
S. I. Torunov
Keyword(s):  
High Explosives ◽  
Detonation Parameters ◽  
Liquid High Explosives

scholarly journals Scaled-down test arrangements for characterizing high explosives

2021 ◽  
pp. 28-33
Author(s):  
Martin Künzel ◽  
Jindrich Kučera
Keyword(s):  
Experimental Determination ◽  
Detonation Velocity ◽  
Sufficient Data ◽  
High Explosives ◽  
Test Set ◽  
Detonation Parameters ◽  
Labour Costs ◽  
Velocity Pressure

Newly formulated explosives and the optimization of explosive mixtures requires an experimental determination of detonation parameters, especially detonation velocity, pressure and metal accelerating ability. Increasing material and labour costs force researchers to reduce test quantities and therefore to develop smaller scale experiments which provide sufficient data to determine an explosive’s properties. Seven test set-ups found in literature are described and compared in this paper.

Determination of the detonation parameters of condensed explosives

1965 ◽  
Vol 1 (3) ◽  
pp. 1-5 ◽  
Author(s):  
V. A. Veretennikov ◽  
A. N. Dremin ◽  
K. K. Shvedov
Keyword(s):  
Detonation Parameters ◽  
Condensed Explosives

scholarly journals X. A method of measuring the pressure produced in the detonation of high, explosives or by the impact of bullets

1914 ◽  
Vol 213 (497-508) ◽  
pp. 437-456 ◽  
Keyword(s):  
Practical Interest ◽  
Direct Determination ◽  
High Explosives ◽  
Time Curve ◽  
Considerable Difficulty ◽  
Cylindrical Steel ◽  
Set Up ◽  
The Right ◽  
The Impact

The determination of the actual pressures produced by a blow such as that of a rifle bullet or by the detonation of high explosives is a problem of much scientific and practical interest but of considerable difficulty. It is easy to measure the transfer of momentum associated with the blow, which is equal to the average pressure developed, multiplied by the time during which it acts, but the separation of these two factors has not hitherto been effected. The direct determination of a force acting for a few hundred-thousandths of a second presents difficulties which may perhaps be called insuperable, but the measurement of the other factor, the duration of the blow, is more feasible. In the case of impacts such as those of spheres or rods moving at moderate velocities the time of contact can be determined electrically with considerable accuracy.* The present paper contains an account of a method of analysing experimentally more violent blows and of measuring their duration and the pressures developed. If a rifle bullet be fired against the end of a cylindrical steel rod there is a definite pressure applied on the end of the rod at each instant of time during the period of impact and the pressure can be plotted as a function of the time. The pressure-time curve is a perfectly definite thing, though the ordinates are expressed in tons and the abscissae in millionths of a second; the pressure starts when the nose of the bullet first strikes the end of the rod and it continues until the bullet has been completely set up or stopped by the impact. Subject to qualifications, which will be considered later, the result of applying this varying pressure to the end is to send along the rod a wave of pressure which, so long as the elasticity is perfect, travels without change of type. If the pressure in different sections of the rod be plotted at any instant (fig. l) then at a later time the same curve shifted to the right by a distance proportional to the time will represent the then distribution of pressure. The velocity with which the wave travels in steel is approximately 17,000 feet per second. As the wave travels over any section of the rod, that section successively experiences pressures represented by the successive ordinates of the curve as they pass over it. Thus the curve also represents the relation between the pressure at any point of the rod and the time, the scale being such that one inch represents the time taken by the wave to travel that distance which is very nearly 1/200,000 of a second. In particular the curve giving the distribution of pressure in the rod along its length is, assuming perfect elasticity, the same as the curve connecting the pressure applied at the end and the time, the scale of time being that just given.

scholarly journals Determination of detonation products equation of state from cylinder test: Analytical model and numerical analysis

2015 ◽  
Vol 19 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Predrag Elek ◽  
Vesna Dzingalasevic ◽  
Slobodan Jaramaz ◽  
Dejan Mickovic
Keyword(s):  
Equation Of State ◽  
Analytical Model ◽  
Element Model ◽  
Detonation Products ◽  
High Explosives ◽  
Cylinder Test ◽  
Proposed Model ◽  
Numerical Finite Element ◽  
Abaqus Model

Contemporary research in the field of explosive applications implies utilization of hydrocode simulations. Validity of these simulations strongly depends on parameters used in the equation of state for high explosives considered. A new analytical model for determination of Jones-Wilkins-Lee (JWL) equation of state parameters based on the cylinder test is proposed. The model relies on analysis of the metal cylinder expansion by detonation products. Available cylinder test data for five high explosives are used for the calculation of JWL parameters. Good agreement between results of the model and the literature data is observed, justifying the suggested analytical approach. Numerical finite element model of the cylinder test is created in Abaqus in order to validate the proposed model. Using the analytical model results as the input, it was shown that numerical simulation of the cylinder test accurately reproduces experimental results for all considered high explosives. Therefore, both the analytical method for calculation of JWL equation of state parameters and numerical Abaqus model of the cylinder test are validated.

scholarly journals Effect of aluminium additives on selected detonation parameters of a bulk emulsion explosive

2020 ◽  
pp. 99-113
Author(s):  
Bartłomiej Kramarczyk ◽  
Mateusz Pytlik ◽  
Piotr Mertuszka
Keyword(s):  
Detonation Velocity ◽  
Free Field ◽  
Aluminium Content ◽  
Velocity Measurements ◽  
Emulsion Explosive ◽  
Emulsion Explosives ◽  
Air Blast ◽  
Explosive Strength ◽  
Detonation Parameters

The article presents an assessment of the influence of aluminium granules content on selected detonation parameters of a chemically sensitised bulk emulsion explosive. The analysis covered determination of relative explosive strength using a ballistic mortar and Trauzl blocks, free field air blast tests and detonation velocity measurements. Five types of emulsion explosives with differing aluminium content were tested at loadings of 0, 1, 3, 5 and 7%.

scholarly journals Experimental investigation of detonation waves instabilities in liquid high explosives

2018 ◽  
Vol 946 ◽  
pp. 012058 ◽  
Author(s):  
V A Sosikov ◽  
S I Torunov ◽  
A V Utkin ◽  
V M Mochalova ◽  
D Yu Rapota
Keyword(s):  
Experimental Investigation ◽  
Detonation Waves ◽  
High Explosives ◽  
Liquid High Explosives

Influence of the finite rate of high-explosive decomposition on the determination of detonation parameters

1981 ◽  
Vol 17 (6) ◽  
pp. 685-688 ◽  
Author(s):  
S. M. Bakhrakh ◽  
A. A. Evstigneev ◽  
V. N. Zubarev ◽  
A. A. Shanin
Keyword(s):  
High Explosive ◽  
Explosive Decomposition ◽  
Finite Rate ◽  
Detonation Parameters
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