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Accession Number:
AD0294105
Title:
MEASUREMENTS OF COUPLING BETWEEN COLUMNS OF EXPLOSIVE AND ARTIFICIAL ROCKS
Corporate Author:
BUREAU OF NAVAL WEAPONS WASHINGTON D C
Report Date:
1962-11-01
Abstract:
An attempt has been made to measure the coupling between an explosive and a material by using the pellet technique, and some results have been obtained. This technique gives a measure of one parameter of coupling, the momentum in a portion of the shock wave corresponding to twice the thickness of the pellet. Pellets made from the specimen materials were placed on a flat surface inclined with the axis of the specimen such that the shock wave generated by the explosion would strike the surface at normal incidence. The movement of the pellets was photographed with a Fastax movie camera and their velocities determined. The pellet technique appears to give a good measure of the momentum in the shock wave. Long pellets seem to behave more favorably than short ones of the same diameter. The best correlation was found between the momenta of the pellets and both the quantities rho c and rho c squared where rho is the mass density and c the dilatational wave velocity of the material. Momentum was found to increase with increasing rho c and with increasing rho c squared. In these tests no correlations exist between the momentum and the tensile strength, between the momentum and the shearing strength, and between the momentum and the compressive strength. The test results show a marked decrease in momentum for an increase in porosity. Author
Pages:
0001
File Size:
0.00MB
