A Comparison of the Static and Fatigue Strengths of Formed and Drilled Holes in Composite Laminates.

Abstract

Holes in structural members introduce areas of high stress concentration When "laying-up" a laminate composite, it is possible to form the holes before cure, instead of cutting the fibers by drilling the holes after cure. The diverted fibers maintain their continuity and provide added strength in the highly stressed region around the hole. Accordingly, it was hypothesized that a laminate with formed holes would be stronger than a similar laminate with drilled holes.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1977
Accession Number
ADA301542

Entities

People

  • R. Richey
  • Shilin Huang

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Composite Material Fabrication
  • Composite Materials
  • Epoxy Laminates
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Graphitic Materials
  • Laminates
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Working

Readers

  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.