Accession Number : ADA319910

Title :   Study of Constitutive Models for Concrete Penetration Analysis.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J

Personal Author(s) : Gold, Vladimir M.

PDF Url : ADA319910

Report Date : DEC 1996

Pagination or Media Count : 43

Abstract : Three-dimensional axisymmetric calculation of penetration of concrete targets have been conducted with the CALE (Arbitrary Lagrangian Eulerian) code. All the constitutive models studied accounted for the compressibility of concrete and employed either solid or porous equation of state models; the influence of these models on the penetration calculations is studied and presented. This size of the plastic zone in front of the penetrator is estimated from the calculations for both compressibility models and is compared with the available experimental data. Comparison between the calculated values of the extent of this zone and the experimental data indicates that the porous equation of state model is more realistic in representing the elastic-plastic deformations in concrete. Effects of the initial porosity of concrete on penetration calculations are studied and discussed. The application of constant yield-strength and pressure-dependent yield-strength models for the concrete penetration analysis is studied, and the results of the calculations are presented and discussed. Crater profiles calculated with the pressure-dependent yield model showed good agreement with the available experimental penetration depths and the profiles of the tunnel portion of the crater.

Descriptors :   *CONCRETE, *PENETRATION, *PLASTIC PROPERTIES, MATHEMATICAL MODELS, LOAD DISTRIBUTION, PROJECTILES, DEFORMATION, POROSITY, IMPACT STRENGTH, FLOW FIELDS, TERMINAL BALLISTICS, HYDRODYNAMIC CODES, YIELD STRENGTH, TARGET STRENGTH, CRATERS, COMPRESSIVE PROPERTIES, ELASTOPLASTICITY, AXISYMMETRIC FLOW.

Subject Categories : Mechanics
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE