Effects of Static Tensile Load on the Thermal Expansion of Gr/PI Composite Material.

Abstract

The effect of static tensile load on the thermal expansion of Gr/PI composite material was measured for seven different laminate configurations. A computer program was developed which implements laminate theory in a piecewise linear fashion to predict the coupled nonlinear thermomechanical behavior. Static tensile load significantly affected the thermal expansion characteristics of the laminates tested. This effect is attributed to a fiber-instability micromechanical behavior of the constituent materials. Analytical results correlated reasonably well with free thermal expansion tests (no load applied to the specimen). However, correlation was poor for tests with an applied load. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1981
Accession Number
ADA099805

Entities

People

  • Gary L. Farley

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Materials
  • Computer Programs
  • Coordinate Systems
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Testing
  • Mechanical Working
  • Shear Stresses
  • Strain Gages
  • Stress Strain Relations
  • Stresses
  • Tensile Stress
  • Test Methods
  • Thermal Expansion
  • Thermal Stresses

Readers

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