Accession Number : ADA183527

Title :   Analysis of Dynamic in Situ Backfill Property Tests. Report 3. The Modified ONED Program for One-Dimensional Planar Stress Wave Propagation.

Descriptive Note : Technical rept.,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Seaman,Lynn

Report Date : JUL 1987

Pagination or Media Count : 99

Abstract : ONED is a small one-dimensional stress wave propagation computer program for simulating explosive loading on layers of soil. The method of artificial viscosity is used with an explicit computational technique. Materials treated can be solids, porous solids, gases, and explosives. The loading causing the waves can be provided either as a pressure history or by the detonation of an explosive layer. The materials are represented by three-dimensional models with separate treatments for the pressure and deviatoric stresses. The pressure for the porous material is given by loading and unloading curves defined by varying moduli. The deviator stress model describes elastic and plastic behavior with either a Mises or a Coulomb friction yield limit. The detonation of an explosive is provided by either a polytropic gas relation or a tabular isentrope. This version of ONED is an amplification of an earlier version used at the US Army Engineer Waterways Experiment Station for many years. The main changes are the conversion to an explicit computational scheme, use of artificial viscosity, provision for large deformations, addition of explosive detonations, and use of separable material model routines. (Author)

Descriptors :   *DETONATIONS, *EXPLOSIVES, *COMPUTATIONS, *ELASTIC PROPERTIES, *COMPUTER PROGRAMS, EXPLOSIVES, FRICTION, LIMITATIONS, YIELD, DEFORMATION, POROUS MATERIALS, VISCOSITY, LAYERS, GASES, PLASTIC PROPERTIES, HISTORY, PRESSURE, SOLIDS, ISENTROPE, TABLES(DATA), DISTRIBUTION CURVES, UNLOADING, MATERIALS, MATHEMATICAL MODELS, MATHEMATICAL PROGRAMMING, SEPARATION, MODELS, STRESSES, MODELS, THREE DIMENSIONAL

Subject Categories : Computer Programming and Software
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE