Constitutive Model Parameter Study For Armor Steel And Tungsten Alloys

Abstract

A computational parametric study was performed to assess the influence of the selection of Johnson-Cook constitutive model parameters on the numerical simulation of tungsten rods penetrating rolled homogeneous armor (RHA) steel targets. The parameter space involved two sets of Johnson-Cook model parameters for RHA, two sets of Johnson-Cook parameters for the tungsten rod material, four tungsten rod length-to-diameter (L/D) ratios, and two continuum mechanics codes. Striking velocities considered in the study ranged from approximately 1000 - 2000 m/s. The study revealed that no single combination of Johnson-Cook model parameters provides superior overall prediction of penetration depth over the other possible combinations across the full range of rod L/D considered. The study provides valuable guidance on the selection of material model parameters future studies of kinetic energy penetration.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA556741

Entities

People

  • Stephen J. Schraml

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Applied Mechanics
  • Armor
  • Continuum Mechanics
  • Diameters
  • Experimental Data
  • Geometry
  • Hardening
  • Kinetic Energy
  • Materials
  • Mechanics
  • Military Research
  • Physics
  • Rolled Homogeneous Armor
  • Simulations
  • Tungsten
  • Tungsten Alloys

Readers

  • Clinical Trial Research.
  • Metallurgy
  • Structural Dynamics.

Technology Areas

  • Space