Accession Number : AD0855882

Title :   Numerical Ground Motion Studies, Volume III. Ground Motion Studies and AFTON Code Development.

Descriptive Note : Technical rept. Jan 67-Apr 68,

Corporate Author : APPLIED THEORY INC SANTA MONICA CA

Personal Author(s) : Trulio, J. G. ; Germroth, J. J. ; Carr, W. E. ; McKay, M. W.

Report Date : FEB 1969

Pagination or Media Count : 201

Abstract : Results are presented for four calculations of edge effects in test beds. Lateral edges are found to influence motion only slightly, whereas front and back edges pertrub horizontal ground motion strongly. Changes to the axisymmetric AFTON code to include elastic-plastic hysteretic materials are described; inelastic deformation theory is briefly reviewed, and generalized to take into account finite strain and nonlinear elasticity. Also discussed are a test of the code for a problem of spherical motion, a variable timestep scheme with results of AFTON 1 test calculations, and a numerical integration procedure for solution of the radiation diffusion equation. (Author)

Descriptors :   (*NUCLEAR EXPLOSIONS, SOIL MECHANICS), (*SOILS, DEFORMATION), EXPLOSION EFFECTS, STRESSES, ELASTIC PROPERTIES, MOTION, PLASTIC PROPERTIES, STRAIN(MECHANICS), MATHEMATICAL MODELS, COMPUTER PROGRAMMING, NUMERICAL METHODS AND PROCEDURES, SURFACE BURST.

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE