Fracture Behavior of Ceramic Composites.

Abstract

A combined experimental and analytical study is described which investigated the strength and fracture toughness of whisker reinforced ceramics. Experiments were performed on Al2O3 reinforced with SiC whiskers mechanically loaded in four-point flexure. The results showed an increase in flexural strength and KIC as the whisker content of the composites was increased. Several fracture and strength theories were compared to the experimental results. The hypothesis which appeared most consistent with the data treated the composites as though they contained inherent flaws which were the length of the mean free path between reinforcing whiskers. Using this crack size, the measured flexural strength of the composites could be predicted by applying linear elastic fracture mechanics. Originator-supplied key words include: Ceramic matrix composites.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1983
Accession Number
ADA150819

Entities

People

  • K. W. Buesking
  • S. N. Chatterjee

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aspect Ratio
  • Ceramic Matrix Composites
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Flexural Strength
  • Fracture (Mechanics)
  • Grain Size
  • Material Degradation Processes
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanics
  • Plastic Explosives
  • Scientific Research
  • Stress Intensity Factors
  • Stress Strain Relations

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Reinforced Composite Materials