Accession Number : AD0848292

Title :   The Finite-Element Method for Investigating Edge Effects in the High-Explosive Simulation Technique (HEST), Project HEST Test V.

Descriptive Note : Technical rept. Jan-Jun 68,

Corporate Author : AGBABIAN-JACOBSEN ASSOCIATES LOS ANGELES CA

Personal Author(s) : Adham, S. A. ; Malthan, J. A.

Report Date : FEB 1969

Pagination or Media Count : 183

Abstract : Two-dimensional plane strain elastoplastic analyses of the free-field response of the HEST V Test and the HEST V Demonstration Test sites under long-term (static) loading were performed. A finite element representation of the continuum was used. Low-shear-strength models of the soils were used to allow an examination of the effects of material yielding and flow. The vertical cross sections of the HEST configurations were accurately modeled and include the berms and soil layering. The HEST cavity surcharge was neglected because its main function was to provide a long-duration pressure in the cavities. Stress and displacement contours are reported. The results obtained from this study conformed to observed behavior in previous HEST Tests, i.e., yielding and flowing of the soil beneath the test cavities produced unrecoverable vertical sinking of the central portion of the test bed in conjunction with large outward movements of the soil in and beneath the berms. (Author)

Descriptors :   (*TERRAIN, NUCLEAR EXPLOSIONS), (*NUCLEAR EXPLOSIONS, EXPLOSION EFFECTS), BLAST, MATHEMATICAL MODELS, SOIL MECHANICS, SHEAR STRESSES, SURFACE BURST, LOADS(FORCES), COMPUTER PROGRAMS, SUBROUTINES, ELASTIC PROPERTIES, SIMULATION, PLASTIC PROPERTIES.

Subject Categories : Soil Mechanics
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE