The Effect of Environment on the Mechanical Behavior of AS/3501-6 Graphite/Epoxy Material

Abstract

The effect of temperature and moisture on the fatigue properties of AS/3501-6 composite was investigated. Micromechanics was used to relate the composite's compliance to the matrices' compliance. The stress state of the laminate was studied by using Tsai-Wu quadratic failure criterion through uniaxial specimen testings. Intralaminar cracks and delaminations were studied by testing (+ or - 45/902)s layup specimens. A laminate analysis method was used to evaluate the energy release rate of the (+ or - 45/902)s specimens. Results indicate that predicted critical strains are above those for which specimens begin to exhibit noticeable softening due to damage. To improve fatigue failure prediction behavior intraply microcracking must be accounted for in the theoretical model.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1983
Accession Number
ADA133331

Entities

People

  • R. A. Schapery
  • Tak‐San Ho

Organizations

  • Vought

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Composite Materials
  • Crack Tips
  • Environment
  • Epoxy Composites
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Measurement
  • Mechanical Working
  • Mechanics
  • Micromechanics
  • Modulus Of Elasticity
  • Naval Air Stations

Readers

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