Certification of Composite Aircraft Structures Under Impact, Fatigue and Environmental Conditions. Part 3. Environmental Effects on Compressive Strength.

Abstract

The compressive behavior of a graphite/epoxy (As-3501-6) composite system is studied here experimentally and analytically. First, a test method is developed using a flat end specimen. Tests are then performed for six (6) different composite laminates. In each case, the variation of the test temperature ranges from -12 C to 121 C while the variation of the moisture content in the specimens ranges from dry to saturated wet. Two cases of dry/wet/dry conditioned specimens are also studied. An analytical model which is based on the concept of microbuckling is developed to predict the compression strength of unidirectional laminates. The analytical results compare well with experiment: The rule-of-mixture method is shown to predict the compressive strength of laminates of complex lay-ups.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1978
Accession Number
ADA325795

Entities

People

  • Albert S. Wang

Organizations

  • Drexel University

Tags

Communities of Interest

  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Aircrafts
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Graphitic Materials
  • Laminates
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Working
  • Moisture Content
  • Shear Modulus
  • Shear Stresses
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Test Methods

Readers

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