Durability of Continuous Fiber Reinforced Metal Matrix Composites

Abstract

The objective of this program was to develop the test data and analysis techniques required to insure the structural integrity of fiber reinforced metal matrix composites (FRMMC) when applied to airframe structures. Approximately 300 tests of unidirectional boron/6061 aluminum, (B4C)/15-3-3-3 titanium, and crossplied boron/6061 aluminum were performed. Testing was concentrated on notched (central hole) specimens to evaluate the notch sensitivity of these materials and to discriminate between the failure modes of aluminum and titanium matrix composites. It was found that the relative fiber and matrix stiffnesses and strengths determine primary failure modes in fatigue. Analysis methods were developed based on fiber and matrix properties to predict notched and unnotched static strength, crack initiation, fatigue failure mode, life to failure, and residual strength. One half of the tests (150 specimens) were performed to verify the predicted properties of the aluminum and titanium matrix composites.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1987
Accession Number
ADA193868

Entities

People

  • C. R. Saff
  • C. T. Sun
  • D. M. Harmon

Organizations

  • McDonnell Aircraft Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Composite Material Fabrication
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Laminates
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Metal Matrix Composites
  • Notch Sensitivity
  • Plastic Properties
  • Stress Strain Relations
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Structural Health Monitoring of Composite Structures.