Experimental Determination of Critical Physical Parameters Affecting JA2 Propellant Grain Response. Phase 1. Screening Design

Abstract

Uniaxial compression tests are performed on single grain, seven- perforation JA2 propellant specimens using a statistically-based, 24 (factorial) design strategy. A total of sixteen tests are performed and a mechanical response surface is generated over the range of continuous variables, strain rate (10-4 and 500 sec-1), temperature (0 and 60 degrees Celsius), and specimen aspect ratio (0.8 and 1.3), and discrete variable, specimen end lubrication ( yes or no ). It is found that specimen end lubrication reduces the variability of the mechanical response of JA2 but does not affect the magnitude of the mechanical response as characterized by the yield stress, yield strain, compressive modulus, and strain energy absorbed at yield. The specimen aspect ratio did not affect the mechanical response of JA2 because of the limited aspect ratio range investigated.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1991
Accession Number
ADA237041

Entities

People

  • David A. Hopkins
  • George A. Gazonas
  • James C. Ford

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ammunition
  • Artillery
  • Aspect Ratio
  • Coefficients
  • Engineering
  • Gun Propellants
  • Information Science
  • Jet Propulsion
  • Materials
  • Mechanical Engineering
  • Mechanical Properties
  • Military Research
  • Polynomials
  • Propellant Grains
  • Propellants
  • Standards
  • Strain Rate

Readers

  • Materials Science (Mechanical Engineering).
  • Nuclear Civil Defense.
  • Regression Analysis.