Investigation of Tension-Compression Fatigue Behavior of a Unidirectional Metal Matrix Composite at Elevated Temperature.

Abstract

This study investigated the fatigue behavior in a unidirectional metal matrix composite under tension-compression loading conditions. Stress-strain responses, modulus and strain trends were monitored to characterize damage. Fractography and microscopy were used to characterize failure modes. Fatigue life curves were plotted base on different parameters such as stress and strain. Tension-compression fatigue life was shorter than the obtained under tension-tension fatigue cycling. Creep, observed in tension-tension. fatigue cycling, and the effects of the compressive load on the plastic zone around the crack tip explain shorter life under tension-compression fatigue loading.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA289394

Entities

People

  • Darren L. Kraabel

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemistry
  • Composite Materials
  • Crack Tips
  • Cracks
  • Creep
  • Engineering
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • High Temperature
  • Materials
  • Materials Science
  • Mechanics
  • Metal Matrix Composites
  • Microscopy
  • Stress Strain Relations
  • Test And Evaluation

Fields of Study

  • Engineering
  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.