Accession Number : ADA327659

Title :   Numerical Algorithms in a Lagrangian Hydrocode.

Descriptive Note : Final rept. Jun 92-May 97,

Corporate Author : ALLIANT TECHSYSTEMS INC HOPKINS MN

Personal Author(s) : Johnson, G. R. ; Stryk, R. A. ; Holmquist, T. J. ; Beissel, S. R.

PDF Url : ADA327659

Report Date : JUN 1997

Pagination or Media Count : 205

Abstract : This report documents the numerical algorithms used in an explicit Lagrangian finite element hydrocode. One, two, and three dimensional implementations of the numerical solution of the conservation equations are covered. Triangular and tetrahedral continuum elements and shell elements are described. SPH (Smooth Particle Hydrodynamics) techniques are discussed. Slideline techniques are explained. Material models are presented for constitutive behavior and equation of state behavior for several categories of materials. This report is a comprehensive presentation of the numerical techniques used in a current production hydrocode.

Descriptors :   *ALGORITHMS, *STRUCTURAL MECHANICS, *HYDRODYNAMIC CODES, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, EQUATIONS OF MOTION, FINITE ELEMENT ANALYSIS, SHELLS(STRUCTURAL FORMS), CONTINUUM MECHANICS, FRACTURE(MECHANICS), STRUCTURAL RESPONSE, AXISYMMETRIC, NUMERICAL METHODS AND PROCEDURES, EQUATIONS OF STATE, LAGRANGIAN FUNCTIONS.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE