Effects of Prior Aging at 260 deg C in Argon on Inelastic Deformation Behavior of PMR-15 Polymer at 260 deg C: Experiment and Modeling

Abstract

The inelastic deformation behavior of PMR-15 neat resin, a high-temperature polymer, was investigated at 260 deg C. The experimental program was designed to explore the influence of strain rate on loading and unloading behaviors. In addition, the effect of prior strain rate on creep, relaxation, and recovery responses was evaluated. The material exhibits positive, nonlinear strain rate sensitivity in monotonic loading. Early failures occur before inelastic flow is fully established. The creep, relaxation, and recovery responses are significantly influenced by prior strain rate. The experimental data were modeled using the Viscoplasticity Based on Overstress for Polymers (VBOP) theory. The effects of prior aging in argon at 260 deg C on the time (rate)-dependent behavior of the PMR-15 polymer were evaluated in a series of strain controlled experiments. Several of the VBO material parameters were expanded as functions of prior aging time. The resulting model was used to predict the behavior of PMR-15 subjected to various prior aging durations.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2010
Accession Number
ADA517402

Entities

People

  • Bradley K. Diedrick

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Elastic Properties
  • Experimental Data
  • Glass Transition Temperature
  • High Temperature
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Modulus Of Elasticity
  • Polymer Matrix Composites
  • Resins
  • Strain Rate
  • Stress Strain Relations
  • Tensile Strength

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Organic Chemistry