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EXPERIMENTAL STUDY OF THE EFFECT OF MATERIAL PROPERTIES ON COUPLING OF EXPLOSION ENERGY
UNITED RESEARCH SERVICES CORP BURLINGAME CA
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An experimental study was made of the influence of material properties of the directly transmitted effects on explosions. Small spherical high-explosive charges were used to load a series of cylindrical blocks of fine aggregate concrete, either at the surface of a block, with in a block, or at the contact surface of two blocks. Measurements were made of the variations in concrete properties, of the total impulse delivered to the block supports, of the permanent deformations and craters, and of the air-blast pressures. It was found that material properties have a major effect on the total impulse transmitted to the material, little effect on the air blast waves, and a very large influence on the sizes and shapes of the craters produced. Although crater dimensions appeared to vary approximately as the cube root of charge weight, both the crater volume and the total impulse varied by at least a factor of two, and scaled crater depth appeared to be approximately independent of burst geometry. The compressibility, as measured by Youngs modulus, appeared to have greatest effect on the impulse, while the internal shear strength and other properties reflecting the internal structure of the material had greatest effect on crater dimensions.
APPROVED FOR PUBLIC RELEASE