High Strain Rate Mechanical Properties of Epoxy and Epoxy-Based Particulate Composites (Preprint)

Abstract

Polymers and polymer-based particulate composites are becoming increasingly used in aerospace structural applications, where they experience complex, non-static loads. Correspondingly, the high strain rate mechanical properties are of increasing importance. This paper investigates the properties of epoxy - bisphenol-A/diethanolamine epoxy (Epon 826/DEA) - and epoxy-based particulate composites across strain rates from 10(exp -3) to 10(exp 5) /s. The samples were tested using Instron, traditional split Hopkinson pressure bars (SHPBs) and a miniaturized SHPB for ultra-high strain rates. Additionally, the epoxy samples are tested with dynamic mechanical analysis to look at the effects of time-temperature superposition on the strain rate effects in the samples. The results of the testing are compared to the Hasan-Boyce model for polymers, which has shown good agreement with other epoxy studies, to develop constitutive equations for these materials.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2007
Accession Number
ADA468014

Entities

People

  • Brad White
  • J L Jordan
  • Jonathan E. Spowart
  • Wayne Richards

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Alkanes
  • Composite Materials
  • Epoxy Composites
  • Information Science
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Particle Size
  • Statistical Analysis
  • Strain Rate
  • Stresses
  • United States

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials

Technology Areas

  • Space