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DETONATION PROPERTIES
Table 3.48 DETONATION FAILURE THICKNESS
Failure
Density Thickness
Explosive k/cm? (mm)
Pure Explosives
Ammonium picrate 1.64 3.29
TNT 1.61 1.91”
Castable Mixtures
Comp A-3 1.63 0.57
Comp B-3 1.72 0.94
Cyclotol75/25 1.75 1.51
Octal 75/25 1.79 1.43
Pentolite 1.70 1.39b
HMX-Based
PBX 9011
PBX 9404
X-0204
RDX-Based
PBX 9010
PBX 9205
PBX 9407
“Pressed at 65°C.
Tast SO-mm wedge.
Plastic-Bonded Explosives
1.77 0.61
1.83 0.46
1.922 0.41
1.78 0.52
1.69 0.57
1.77 0.30
A linear curve is fitted through the data and extrapolated to 0”, and the failure
thickness at 0” is designated the detonation failure thickness.
If the brass plate were completely incompressible, the failure thickness so deter-
mined would be half that of an unconfined infinite sheet. The failure thickness of an
unconfined sheet is less than the failure diameter of a cylinder because rarefactions
in a cylinder enter from all sides of the charge and influence the detonation. Thus,
the failure diameter may be several times the failure thickness and may vary from
one explosive to another.
More complete details are given in a LASL report.s
REFERENCES
1. W. E. Deal, Journal of Chemical Physics 27(l), 796-800 (September 1957).
-2. Louis C. Smith, Explosivstoffe 15, 106-110, 130-134 (1967).
3. Manuel J. Urizar, Suzanne W. Peterson, and Louis C. Smith, Los Alamos
Scientific Laboratory report LA-7193-MS (April 1978).
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