Strength and Failure Analysis of Composite Laminate Containing a Circular Hole with Reinforcement

Abstract

Tension and compression tests of quasi isotropic, graphite/epoxy laminate containing circular hole with reinforcement was conducted using Instron static testing machine. Two types of reinforcement boundary conditions were investigated; adhesive band reinforcement and snug-fit unbonded plug. For each case boundary conditions, four different sizes of hole diameter and three types of reinforcing material (aluminum, plexiglass, steel) were employed for investigation. The experiments were mainly focused on the evaluation of ultimate strength of reinforced panel relative to the case of open hole. In addition to this, failure mechanism analysis for both boundary conditions were studied. To help designers and users of composite, previously available theoretical fracture models and their comparison with the present experimental results are also discussed. Keywords: Composite materials, Bonding, Openings, Strength, Reinforcement.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA189629

Entities

People

  • Jong H. Lee

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautical Engineering
  • Composite Materials
  • Diameters
  • Engineering
  • Epoxy Laminates
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Graphitic Materials
  • Laminates
  • Materials
  • Materials Laboratories
  • Mechanics
  • Notch Sensitivity
  • Reinforcing Materials
  • Stress Concentration
  • Stress Strain Relations
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Reinforced Composite Materials
  • Structural Dynamics.