Microcracking in Graphite-Epoxy Composites

Abstract

Microcracking in composite materials is commonly caused by ply stiffness variations in crossply layup during application of applied stress, and by differential thermal expansion coefficients of the fiber and the matrix during thermal excursions. It is responsible for changes in macro- and micromechanical properties, permeability to gases, and dimensional instability. Theories, experimental techniques, and effects of microcracking are reviewed. The coefficient of cracking expansion is defined, and procedures for reducing deleterious effects of microcracking on composite structures are presented.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA089894

Entities

People

  • Ernest G. Wolff

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Composite Materials
  • Creep
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Micromechanics
  • Stress Strain Relations
  • Stresses
  • Thermal Expansion

Readers

  • Calculus or Mathematical Analysis
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.