The Effect of Particle Reinforcement on the Dynamic Deformation of Epoxy-Matrix Composites

Abstract

Multiphase composite materials consisting of one or more types of particle reinforcement in an epoxy matrix are being studied to determine the effect of reinforcement on the dynamic yield strength and critical impact velocity for plastic deformation. Casting was used to prepare epoxy matrix composites with varying particle loading fractions (20-50 Vol%), size 5 and 50|im), and type (Al or Ni+Al). The cast samples were tested at strain rates in the range of 10^ to 10" s"', using a 7.62 mm gas gun with a rod-on-anvil (Taylor) impact experiment setup. The recovered impacted specimens were analyzed to determine the dimensions of their deformed and undeformed regions. The yield strength and critical velocity for plastic deformation were evaluated using Hutching's analysis and correlated with quantitative characteristics of the size and distribution of the reinforcement phases.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2010
Accession Number
ADA535557

Entities

People

  • Bradley W. White
  • J L Jordan
  • Jonathan E. Spowart
  • Naresh N. Thadhani

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Composite Materials
  • Energetic Materials
  • Factorial Design
  • Government Procurement
  • Governments
  • Materials
  • Materials Science
  • Military Research
  • Munitions
  • Particle Size
  • Particles
  • Particulates
  • Plastic Deformation
  • Polymer Matrix Composites
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Aerosol Science/Aerosol Physics
  • Structural Dynamics.
  • Structural Health Monitoring of Composite Structures.