A Miniaturized Split Hopkinson Pressure Bar for Very High Strain Rate Testing

Abstract

Measurements of material properties at very high rates of strain give an important insight into the structure of these materials, as well as having many industrial uses. This paper describes a miniaturized split Hopkinson pressure bar (MSHPB) for measuring the stress-strain relationships in materials at strain rates up to 105 s-1, extending the technique from its usual range of 500 - 104 s-1. As well as describing the difficulties of carrying out experiments at very high rates, and how these difficulties are overcome in this system, the paper also shows some data from experiments on copper and polytetrafluoroethylene (PTFE).

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2004
Accession Number
ADA430675

Entities

People

  • Clive R. Siviour
  • J L Jordan

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Chemistry
  • Energetic Materials
  • Fluoropolymers
  • Gas Guns
  • Materials
  • Measurement
  • Mechanical Properties
  • Military Research
  • Munitions
  • Strain Gages
  • Strain Rate
  • Stress Strain Relations
  • Stress Waves
  • Stresses

Readers

  • Economics
  • Mechanical Engineering/Mechanics of Materials.