Determination of Constitutive Model Constants from Cylinder Impact Tests

Abstract

There are currently many different computer codes which can be used for computations of intense impulsive loading due to high velocity impact and/or explosive detonation. Although the current status of these codes is that they can now be used to perform meaningful computations, it is generally agreed that there is a need for improved strength and fracture models. There is also a need to develop efficient procedures to obtain constants for these models. The work described in this report is focused on two computational strength models: The Johnson-Cook model and the Zerilli-Armstrong model. The report first describes the models and discusses relative comparisons. Then model predictions are compared with experimental data from tension/torsion tests and cylinder impact tests. This is followed by a discussion of how cylinder impact tests may be used to determine constants for these models. The reports ends with a summary and conclusions.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA233459

Entities

People

  • G. R. Johnson
  • T. J. Holmquist

Organizations

  • Honeywell International, Inc.

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Computations
  • Energetic Materials
  • Equations
  • Experimental Data
  • Explosives
  • Hardening
  • Impact Tests
  • Materials
  • Mechanics
  • Military Research
  • Softening
  • Strain Hardening
  • Strain Rate
  • Stress Strain Relations
  • Stresses
  • Surface Warfare
  • Warfare

Readers

  • Computational Fluid Dynamics (CFD)
  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.