Subcritical Crack Growth in a Composite Solid Propellant

Abstract

Unixial tension tests using a strain rate of 0.04 in./in./min. are performed on rectangular smooth and single edge-notched specimens of varying thicknesses for a composite solid propellant. Stress strain, crack growth, crack growth rate and crack growth resistance data are provided. Thickness effects and the mechanism of crack growth are described. Methods of calculation are explained for the crack growth rate and the Mode 1 stress intensity factor. A model is developed for the crack stable growth rate as a function of the stress intensity factor. Uniaxial tension tests using a strain rate of 0.04 in.Iin./min. are performed on rectangular smooth and single edge-notched specimens of varying thicknesses for a composite solid propellant. Stress-strain, crack growth, crack growth rate and crack growth resistance data are provided. Thickness effects and the mechanism of crack growth are described. Methods of calculation are explained for the crack growth rate and the Mode 1 stress intensity factor. A model is developed for the crack stable growth rate as a functlon of the stress intensity factor.

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Document Details

Document Type
Technical Report
Publication Date
Jun 10, 1998
Accession Number
ADA409365

Entities

People

  • Chun Ting Liu
  • D. T. Baron
  • Timothy C. Miller

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Composite Materials
  • Composite Propellants
  • Crack Tips
  • Cracks
  • Fracture (Mechanics)
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Mechanics
  • Military Research
  • Particles
  • Propellants
  • Solid Propellants
  • Strain Rate
  • Stress Intensity Factors

Readers

  • Materials Science (Mechanical Engineering).