Accession Number : AD0411132

Title :   CLOSE-IN EFFECTS FROM NUCLEAR EXPLOSIONS.

Descriptive Note : Final rept.,

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Personal Author(s) : Anderson,D.C. ; Fisher,R.D. ; McDowell,E.L. ; Weidermann,A.H.

Report Date : MAY 1963

Pagination or Media Count : 138

Abstract : The close-in effects from subsurface and surface nuclear explosions are treated analytically. Nuclear and chemical explosive efficiencies are computed for several real materials. By compari son of these efficiencies a nuclear-HE equivalence is established from which various close-in effects such as cratering may be scaled. The equivalences are found to be dependent on such material properties as water content, vaporization level, and Hugoniot relations. In addition, a one dimensional model for describing stress propaga tion in real materials is presented. A material properties as water content, vaporization level, and Hugoniot relations. In addition, a one dimensional model for describing stress propaga tion in real materials is presented. A material description which is independent of any specific stress field is developed. It is shown that dissipation effects in plane waves which have been attributed to strain rate effects can be equally well accounted for by deviatoric effects. Appendix A contains an analytical method for pre dicting surface spalls resulting from deep sub surface explosions. The results of the method are shown to be dependent on both tensile and shear strengths. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, SIMULATION), (*CRATERING, SOILS), AIRBURST, UNDERGROUND, HIGH EXPLOSIVE AMMUNITION, STRESSES, PROPAGATION, SHOCK WAVES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE