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Influence of initial density on detonation propagation in a TATB-based high explosive

Journal Article · · Combustion and Flame
PBX 9502 is a polymer-bonded 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)-based insensitive high explosive (HE) which has been extensively studied due to its unique combination of safety and performance properties. Several prior studies have been conducted on detonation propagation in PBX 9502 with an initial density range of 1.890 ± 0.005 g/cm3. Here, we examine systematically the effect of lower initial density, i.e., higher porosity. We present results from nine ambient cylindrical rate-stick tests at densities ρ0 ≈ 1.858, 1.870, and 1.881 g/cm3 across diameters of d = 25.4, 12.7, and 8.0 mm. When combined with previously published data for g/cm3 across the same set of diameters, we are able to provide insights into the multitude of effects that low ρ0 has on detonation propagation. A density-aware detonation shock dynamics (DSD) model is calibrated based on speeds and front shapes from all 12 tests. We then show that the DSD model accurately predicts experimental thickness effect data for two-dimensional PBX 9502 planar slab geometries with ρ0 = 1.874 g/cm3. Examining the DSD surface shape, curvature, and normal surface speed distributions in both rate-stick and two-dimensional arc configurations yields insights into how changes in initial density influence detonation propagation in geometries in which different detonation curvature regimes are accessed.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2484243
Alternate ID(s):
OSTI ID: 2507018
Report Number(s):
LA-UR--24-27843
Journal Information:
Combustion and Flame, Journal Name: Combustion and Flame Vol. 273; ISSN 0010-2180
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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