Dynamic Fracture Responses of Al2O3, Si3N4 and SiCw/Al2O3

Abstract

A hybrid experimental-numerical procedure was used to characterize the dynamic fracture responses of alumina (A12O3), silicon nitrides, (Si3N4) and silicon-carbide whisker/alumina matrix (SiC subW/A12O3) composite. A laser interferometric displacement gage was used to determine through the crack opening displacement (COD), the instantaneous crack tip location during rapid fracture at room temperature and 1000 C. Consistent with previous finding, the dynamic crack arrest stress intensity factor did not exist in the ceramics and ceramic matrix composite studied.

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Document Details

Document Type
Technical Report
Publication Date
Apr 04, 1991
Accession Number
ADA235286

Entities

People

  • Albert S. Kobayashi
  • Y. Takagi

Organizations

  • University of Washington

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Carbides
  • Ceramic Materials
  • Ceramic Matrix Composites
  • Composite Materials
  • Compound Semiconductors
  • Corporations
  • Crack Propagation
  • Crack Tips
  • Displacement
  • Lasers
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Military Research
  • Silicon Carbide
  • Stress Intensity Factors
  • United States

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Directed Energy