Shock wave and detonation wave response of selected HMX based research explosives with HTPB binder systems

Sutherland, Gerrit; Lemar, E. R.; Forbes, J. W.; Miller, Philip J.; Ashwell, K. D.; Baker, R. N.; Liddiard, T. P.

doi:10.1063/1.46245

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…These PBXN-111 reaction zone lengths supporting the detonation wave front for large diameter charges are greater than those found for smaller diameter explosives [13]. Zone lengths are also dependent on the size and quality of explosive ingredients [10,44,45].Note that the zone lengths increase for larger diameter cylinders, which suggests release waves from the radial surface are not interfering with some late time energy release supporting the detonation front. This point is supported by the D data for 47-48 mm cylinders that show D to be greater for the confined charge, where the confinement delays the radial release wave from reaching the center line.…”

Section: Calculated Pbxn-111 Detonation Sonic Zone Lengths As a Functmentioning

confidence: 88%

Steady Detonation Waves in Right Circular Cylinders of Non-ideal Explosives

Forbes

2012

Shock Wave Compression of Condensed Matter

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This chapter overviews the detonation properties in right circular cylinders of non-ideal HE's. This requires some understanding of 2-D hydrodynamic flow and modified ZND theory for non-ideal HE's. This chapter will first cover the modified ZND detonation theory for non-ideal HE's. Then a review of experimental techniques using right circular cylindrical samples will be presented since detonation science's understanding is primarily based on the large experimental data base from cylindrical samples. This will be followed by curved detonation front theory for right circular cylindrical samples and a brief overview of select 2-D flow conditions.Most explosive detonation wave properties are obtained from finite size right circular cylindrical HE samples so it is important to understand how this cylinder geometry effects detonation properties for HE's. Two important features are curved wave fronts and size dependence of properties. Detonation velocities are a functions of diameter (velocity decrement data), initial density, and confinement. Ideal explosives exhibit slight detonation velocity size dependence only near its failure diameter and then fail to propagate a steady detonation wave for smaller diameters. Non-ideal explosives have large variation of detonation velocities as a function of size compared to ideal explosives. Experimental data presented on non-ideal PBXN-111 will demonstrate this feature.The CJ detonation model does not treat the detonation velocity dependencies as a function of charge size. A modified ZND model can explain some of the detonation velocities properties and allows the determination of the sonic reaction zone length. Neither detonation model directly treats the strong dependency of detonation wave velocity on initial density. Non-ideal ExplosivesThe simplest definition of a non-ideal HE is that energy release continues beyond the sonic plane of a steady detonation front [1,2]. Recall the sonic point behind the steady detonation front is where D ¼ u products + c products . Energy release J.W. Forbes, Shock Wave Compression of Condensed Matter, Shock Wave and High Pressure Phenomena,

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Section: Calculated Pbxn-111 Detonation Sonic Zone Lengths As a Functmentioning

confidence: 88%

Steady Detonation Waves in Right Circular Cylinders of Non-ideal Explosives

Forbes

2012

Shock Wave Compression of Condensed Matter

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“…Its unreacted EOS is [9] U,(mm/Ps) = 1.63 + 2.24uP. (1) Six HTPB explosives are listed in Table 1 with combinations of reactivity and thermal tmnsport on and off [10][11][12][13][14]. The results show best agreement with no reactivity of the binder as it affects the detonation velocity, and the spread of detonation velocities is large enough, i.e.…”

Section: Eng-48mentioning

confidence: 99%

Kinetic calculations of explosives with slow-burning constituents

Howard¹,

Souers²,

Fried³

1998

AIP Conference Proceedings

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“…One of the main driving forces in this area has been from the energetic materials community, as many explosives and propellants consist of explosive crystals in a polymer binder. Therefore there exists a wealth of literature on this particular subject [3][4][5][6][7][8][9][10]. Work on inert particulate-polymer matrix composites is driven from the explosives community in the investigation of inert simulants [11] or the need to understand their behaviour as they are often used as potting compounds [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The equation of state of two alumina-filled epoxy resins

Millett¹,

Bourne²,

Deas³

2005

J. Phys. D: Appl. Phys.

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The shock Hugoniots of two different alumina–epoxy particulate composites have been measured in terms of shock velocity, particle velocity and shock stress. Both shock velocities and shock stresses increase with increasing amounts of alumina loading. The shock velocity–particle velocity relationships have been shown to be linear, and that with increasing alumina, behaviour shifts from a viscous to a response more commonly seen in metals and ceramics. Comparisons of the calculated hydrodynamic pressure and shock stress suggest that these materials have a constant shear strength with increasing shock stress. Finally, comparison of the material with the highest amount of alumina, with the work of others, shows close agreement.

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Shock wave and detonation wave response of selected HMX based research explosives with HTPB binder systems

Cited by 7 publications

References 1 publication

Steady Detonation Waves in Right Circular Cylinders of Non-ideal Explosives

Steady Detonation Waves in Right Circular Cylinders of Non-ideal Explosives

Kinetic calculations of explosives with slow-burning constituents

The equation of state of two alumina-filled epoxy resins

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