High Strain Rate Material Behavior

Abstract

High strain rate material behavior of 1020, C1008, HY100 steels, OFHC copper, 7039-T64 aluminum, and BeO was characterized. Data were obtained from split Hopkinson bar (SHB) and plate impact test configurations. A high speed photographic system was used to obtain dynamic stress-strain data from necking Hopkinson bar specimens. The state variable based viscoplastic constitutive model of Bodner and Partom was considered for the material modeling. Computer programs and special purpose subroutines were developed to use the Bodner-Partom model in the STEALTH finite difference code. A unique iterative algorithm was developed to evaluate the model constants from both tensile SHB and plate impact test data. The model constants were determined for the five metals. Both tension and compression SHB and plate impact tests were successfully simulated using Bodner-Partom model constants.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1985
Accession Number
ADA165214

Entities

People

  • A. M. Rajendran
  • Stephan Bless

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Cameras
  • Computer Programs
  • Computers
  • Dynamic Tests
  • Elastic Waves
  • Impact Tests
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanics
  • Modulus Of Elasticity
  • Photographs
  • Photography
  • Shock Waves
  • Strain Gages
  • Stress Strain Relations
  • Stresses

Readers

  • Computational Modeling and Simulation
  • Mechanical Engineering/Mechanics of Materials.