Thermomechanical Response of GR/PI Composites.

Abstract

The effects of temperature changes upon the stresses and strains in composite laminates having carbon fibers in a polyimide matrix have been evaluated. The study treated composites having laminae in which there were non-linear stress-strain relations for stresses transverse to the fibers and for axial shear stresses. Material properties were considered to be temperature dependent. Separately, the effects of laminae viscoelastic response were also treated. Recent experimental data for a carbon/polyimide composite material were utilized in the present analyses. The results suggest that, for this material, non-linearities due either to stress or time dependent effects do not appear to be of major practical importance for conventional high temperature composite structures. However, the effects of time dependent characteristics and temperature dependent properties can be of significance in understanding the behavior of dimensionally stable structures designed for long lifetimes. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA306046

Entities

People

  • Aniruddha P. Nagarkar
  • B. W. Rosen
  • Zvi Hashin

Tags

Communities of Interest

  • Engineered Resilient Systems

DTIC Thesaurus Topics

  • Aircrafts
  • Climate Change
  • Composite Materials
  • Creep
  • Elastic Properties
  • Graphitic Materials
  • Laminates
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Working
  • Mechanics
  • Military Research
  • Plastic Explosives
  • Stress Strain Relations
  • Stresses

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.