Accession Number : ADA179406


Title :   The Expanded Large Scale Gap Test


Descriptive Note : Technical rept.


Corporate Author : NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD


Personal Author(s) : Liddiard, T P ; Price, D


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a179406.pdf


Report Date : Mar 1987


Pagination or Media Count : 49


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).


Descriptors :   *SENSITIVITY , *EXPLOSIVES , *SHOCK , DIAMETERS , SIZES(DIMENSIONS) , MATERIALS , FAILURE , STANDARDIZATION , ELECTRON ACCEPTORS , TETRAFLUOROETHYLENE RESINS , HMX


Subject Categories : Ammunition and Explosives
      Armor


Distribution Statement : APPROVED FOR PUBLIC RELEASE