Mechanical Response of an Al-PTFE Composite to Uniaxial Compression Over a Range of Strain Rates and Temperatures

Abstract

Compressive stress-strain curves were generated for a pressed and sintered mixture of polytetrafluoroethylene and aluminum powders. Experiments were performed at strain rates ranging from 0.001 to 8000/s using a servo-hydraulic load frame and a split Hopkinson pressure bar. High-rate experiments were also performed over a temperature range of 22-78 C. The data is fit to the Johnson-Cook and Modified Johnson-Cook constitutive equations and also to a Zerilli-Armstrong equation adapted for use with polymers. Although the material is known to be reactive, only the inert behavior is described in this report.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2008
Accession Number
ADA487468

Entities

People

  • Daniel Casem

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Compression
  • Constitutive Equations
  • Engineering
  • Equations
  • Fluoropolymers
  • Materials
  • Measurement
  • Mechanical Properties
  • Military Research
  • Polymers
  • Reactive Materials
  • Specific Heat
  • Strain Hardening
  • Strain Rate
  • Stress Strain Relations
  • Stresses

Readers

  • Combustion science or combustion engineering.
  • Mechanical Engineering/Mechanics of Materials.