A Proposed Uniaxial Compression Test for High Strength Ceramics

Abstract

Compressive strength is critical to the performance of ceramics in armor, machine tool bits, and compressively loaded structural components. Traditional compression tests yield misleadingly low values for high strength ceramics. A new test, utilizing a dumbbell-shaped specimen, has been developed and has successfully measured the strength of Al2O3, B4C, TiB2, and SiC. Compression strengths approaching 7 GPa (1 million psi) were measured. Results were accurate, reproducible, and consistent with present compressive fracture theory. A finite element analysis (FEA) was done to confirm a uniaxial stress state. An error analysis examines the severity of procedural errors. The test is simple and cost effective to perform.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1989
Accession Number
ADA231700

Entities

People

  • Carl A. Tracy
  • Paul J. Perrone
  • William A. Dunlay

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Carbides
  • Compressive Strength
  • Elements
  • Finite Element Analysis
  • Geometry
  • Information Processing
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Silicon Carbide
  • Technical Ceramics
  • Tensile Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design