Bolted Joints In Graphite-Epoxy Composites.

Abstract

The purpose of this investigation was to conduct a series of tests on bolted joints in graphite-epoxy composites and develop empirical analysis methods. The fiber patterns tested include the quasi-isotropic pattern and two near-isotropic patterns. The graphite-epoxy used (Thornel 300/ Narmco 5208) is a current high-strength material of moderate modulus and is used widely throughout the composites industry. About one half of the specimens tested were from laminates that had the fibers aligned with the load direction replaced by S-glass. These hybrid laminates exhibited greater stress concentration relief at bolt holes than did the all-graphite materials. The findings of this investigation are supplemented with those from prior work.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1976
Accession Number
ADA305006

Entities

People

  • L. J. Hart-smith

Organizations

  • McDonnell Douglas

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Bearing Strength
  • Bolted Joints
  • Composite Material Fabrication
  • Composite Materials
  • Epoxy Composites
  • Epoxy Laminates
  • Fabrication
  • Failure Mode And Effect Analysis
  • Glass Fibers
  • Graphite Epoxy Composites
  • Laminates
  • Materials
  • Materials Processing
  • Materials Testing
  • Plastic Explosives
  • Stress Concentration
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Mathematics or Statistics
  • Structural Health Monitoring of Composite Structures.