Granular Explosives

Analysis of the effect of grain size on the behavior of the deton wave presents some theoretical difficulties (Ref 2) and can only be approximately achieved if some assumptions are made as discussed in Refs 

On the other hand, its duration is increased in a narrow cartridge or when a sufficiently coarse grist of expl is used, so that a uniform and stable low-velocity deton may be 

Hauver, Pressure Profiles in Detonating Solid Explosives , 3rdONRSymp-Deton(1960), pp 241-52 6a) M.J. Urizar 

Kendrew E.G. Whitbread, The Transition from Shock Wave to Detonation in 60/40 RDX/TNT , Ibid, pp 574-83 10) S.J. 

Jacobs et al, The Shock-to-Detonation Transition in Solid Explosives , 9thSymp-Combstn(1963), pp 517-29 11) G.E. 

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Wright, Granular Explosive Molding Powder , USP 3173817 (1965) CA 62, 12968 (1965) 42) E. James, Development of Plastic Bonded Explosives , Univ of Calif, Rept No UCRL-12439-T (1965) 43) B.A. Stott, Castable... 

A Proposed Mechanism for Shock Initiation of Low Density Granular Explosives , Ptoc... 

Current. Thermal at the Wave Front in Granular Explosives. See Cook (1958), 164-65... 

Seay, "Shock Initiation of Granular Explosives Pressed to Low Density , Ibid, pp 530-35 12) F.J. Warner, "The Initia-... 

A Proposed Mechanism for Shock Initiation of Low Density Granular Explosives , Proc of 4thElectricInitiatorSymp at Franklin Inst, Phila, Pa, 1963, Paper 27 of Rept EIS-A2357 41a) C.L. Mader, PhysFluids... 

Study of the Combustion of a Granular Explosive by Observation of Stress Waves in Surrounding Lucite , PATR 3185(1964)... 

Detonation and deflagration) 110) J. Herschkowitz, "The Chapman-Jouguet Plane for a Granular Explosive , PATM 1474(1964) (Based on the deton vel of a granular mixt of K perchlorate and powdered A1 confined in a Lucite tube and an ideal deton velocity calcd by the Ruby computer, H. found that the C-J plane is ca 0.9cm behind the plane at which the expln reaction begins) 111) W.H. Rinken-bach, formerly of PicArsn, Private communication, Oct 1964) 112) F.J, Cheselske, "In-... 

Accdg to Kistiakowsky s eq (10) (listed above ), therefore, they all lie on the same straight line, ab, drawn from the original (unreacted) state of the explosive. Suppose that the R—H curves relating to various extents of the-reaction of. the explosive are as represented in Fig 4. This is certainly true for gaseous expls and has been shown also by Brinkley Wilson (Ref 7a) to be true for ordinary solid granular explosives. Let... 

Hydrodynamic hot spots. For initiation via impact, characteristic times are of the order of several hundred microseconds and explosion usually starts with a deflagration which can turn into a detonation (Refs 1 5). For this process the heat flow described above appears to be adequate. However, for initiation of detonation, in granular explosive compacts or explosive liquids containing inhomogeneities, via shock the characteristic times are entirely too short for any appreciable heat flow from the hot spot to the surrounding explosive (Ref 6). 

Explosion in Granular Explosives. See Detonation in Granular Explosives in Vol 4, pp D365-R D366-L... 

Wright, S.B. (1965) Granular explosive molding powder. US Patent 3,173,817 Chem. Abstr., 62,12968g. 

Pin Switch Arrangement for Granular Explosives Pin Switch Arrangement for Liquid Explosives Block Diagram of Raster-Generating Circuitry Sample Chronograph Record Pinset Diagram of Cook s Method... 

R.E. Setchell, Optical studies of chemical energy release during shock initiation of granular explosives. Progress in Astronautics and Aeronautics 106, 607-628 (1986)... 

An effective Gruneisen coefficient can be defined for solid materials, including substances such as granular explosives, by... 

J. Roth, Shock Sensitivity and Shock Hugoniots of High-Density Granular Explosives, Fifth Symposium (International) on Detonation, Office of Naval Research Report ACR-184, Washington, D.C., 1970. 

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