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Expanded Large Scale Gap Test.

ADA179406

Publication Date	1987
Personal Author	Liddiard, T. P.; Price, D.
Page Count	54
Abstract	The increased use of very shock insensitive high explosives has produced a need for larger test systems than are normally used for determining gap sensitivities. Relatively little work has been done using acceptor diameters that are larger than 40 or 50 mm. The acceptor diameters in the usual tests are not large enough to give reliable results for the explosives that have large detonation-failure diameters. It follows, then, that the acceptor diameter of the gap test should be substantially larger than the equivalent failure diameter of the acceptor material. If it is otherwise, the gap-test results could be misleading. The objective of this work is to study a new gap test, designed for relatively shock insensitive explosives, by relating its test results to those of a current standardized test. In particular, we wish to establish the relationship between card gap sensitivities in two sizes, the standard NOL (NSWC) Large Scale Gap Test (LSGT) and the new test, the Expanded Large Scale Gap Test (ELSGT).
Keywords	Explosives Shock Sensitivity Diameters Electron acceptors Materials Sizes(Dimensions) Failure Standardization Tetrafluoroethylene resins Hmx Gap tests
Source Agency	Non Paid ADAS
NTIS Subject Category	79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Naval Surface Weapons Center, Silver Spring, MD.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198715

Expanded Large Scale Gap Test.

Expanded Large Scale Gap Test.
ADA179406

Publication Date	1987
Personal Author	Liddiard, T. P.; Price, D.
Page Count	54
Abstract	The increased use of very shock insensitive high explosives has produced a need for larger test systems than are normally used for determining gap sensitivities. Relatively little work has been done using acceptor diameters that are larger than 40 or 50 mm. The acceptor diameters in the usual tests are not large enough to give reliable results for the explosives that have large detonation-failure diameters. It follows, then, that the acceptor diameter of the gap test should be substantially larger than the equivalent failure diameter of the acceptor material. If it is otherwise, the gap-test results could be misleading. The objective of this work is to study a new gap test, designed for relatively shock insensitive explosives, by relating its test results to those of a current standardized test. In particular, we wish to establish the relationship between card gap sensitivities in two sizes, the standard NOL (NSWC) Large Scale Gap Test (LSGT) and the new test, the Expanded Large Scale Gap Test (ELSGT).
Keywords	Explosives Shock Sensitivity Diameters Electron acceptors Materials Sizes(Dimensions) Failure Standardization Tetrafluoroethylene resins Hmx Gap tests
Source Agency	Non Paid ADAS
NTIS Subject Category	79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Naval Surface Weapons Center, Silver Spring, MD.
Document Type	Technical Report
Title Note	Technical rept.
NTIS Issue Number	198715