Accession Number : AD0881904

Title :   Earth Pressure and Ground Shock Profile Measurements.

Descriptive Note : Final rept.,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s) : Vincent, Coye T.

Report Date : MAY 1969

Pagination or Media Count : 31

Abstract : Stanford Research Institute undertook on Prairie Flat(a 500-ton, spherical, TNT-stacked charge placed tangent to the surface) to document the earth pressure in the hydrodynamic region as a function of time, and to record the shock wave profile as it progressed through the hydrodynamic and plastic regions. Manganin wire, piezoresistive gages were installed to measure earth pressure at seven locations covering a pressure range of 35 kbar to 5 kbar. Three slifer cables were laid at three depths--just beneath the surface, 22 inches below the surface, and 45 inches below the surface, extending from ground zero out to 70-foot range--to record the shock profile. Good records, showing pressures somewhat lower than those predicted, were obtained from the manganin-wire gages. Slifer cable data were more erratic than usual and indicated a shock profile that lagged in time behind the arrival times indicated by the pressure gages and by the one time-of-arrival gage whose output was recorded. The output of the remainder of the time-of-arrival gages was not recorded owing to tape machine failure. (Author)

Descriptors :   , (*EXPLOSION EFFECTS, MEASUREMENT), (*NUCLEAR EXPLOSIONS, SHOCK WAVES), (*SOILS, MOTION), TNT, SIMULATION, PROPAGATION, PRESSURE, HYDRODYNAMICS, DETONATIONS, PLASTIC PROPERTIES, PREDICTIONS, PRESSURE GAGES.

Subject Categories : Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE