Accession Number : AD0438711

Title :   THEORETICAL STUDY OF ENERGY DISTRIBUTION IN A HALF-SPACE RESULTING FROM DYNAMIC LOADING IN A DEPRESSION AT THE ORIGIN.

Descriptive Note : Final rept.

Corporate Author : GENERAL AMERICAN TRANSPORTATION CORP NILES ILL

Report Date : MAR 1964

Pagination or Media Count : 62

Abstract : An analysis of the free-field ground motion in the elastic region due to the energy delivered directly to the ground by a nuclear weapon is presented. The problem is approached along two different lines. One of these approaches treats the elastic region as a cratered half-space, where the hemi-spherical boundary of the crater is subjected to the pressure history exerted by a hydrodynamic region within the crater. The other approach treats the elastic region as a complete half-space, a portion of which has initial motion and pressures corresponding to the state of the hydrodynamic region at some instant when its behavior is becoming more nearly elastic than hydrodynamic. For the crateredhalf-space approach, exact analytical expressions are obtained for the stresses at the wavefront, and numerical results based on these expressions are presented. For the complete-halfspace approach, analytical results alone are obtained. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, SOIL MECHANICS), (*SOIL MECHANICS, ELASTIC PROPERTIES), VISCOELASTICITY, HYDRODYNAMICS, PRESSURE, CRATERING, NUCLEAR WEAPONS, STRESSES, EQUATIONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE