Torsion Pendulum Measurements on Viscoelastic Materials During Vacuum Exposure.

Abstract

A torsional pendulum apparatus designed for testing in situ in vacuum, the dynamic mechanical properties of materials is described. The application of this apparatus to an experimental program to measure the effects of vacuum (0.00001 torr) on the mechanical properties of two ablator materials (a foamed material and a filled elastomer) and a solid rocket propellant (a filled elastomer) is presented. Results from the program are discussed as to the effects of vacuum on the mechanical properties of these three materials. In addition, time-temperature-superposition, as a technique for accelerating vacuum induced changes in mechanical properties, is discussed with reference to the three materials tested in the subject program.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
ADA308610

Entities

People

  • Morris L. Evans
  • Thomas C. Ward

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accelerated Testing
  • Accuracy
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Moment Of Inertia
  • Polymers
  • Propellants
  • Solid Propellants
  • Stresses
  • Tensile Strength

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.
  • Reinforced Composite Materials