Modeling of Failure in Monolithic and Ceramic Matrix Composite Under Static and Cyclic Loading

Abstract

A unique experimental procedure was used to determine crack bridging stresses, as well as the fiber/matrix interfacial role during fiber sliding and as an active energy dissipation mechanism in fiber-reinforced ceramic matrix composites with all-oxide constituents. A displacement-controlled failure mechanism dominates in these composites, establishing a useful relationship between accumulated damage and present crack opening displacements for failure prediction under fatigue loading conditions. Microstructural analysis by SEM led to identification of important changes with temperature exposure, allowing the determination of critical service temperatures. Using the LEFM model, values for fracture toughness comparable to those of some metals were found for these composites.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 2004
Accession Number
ADA430835

Entities

People

  • Kenneth W. White

Organizations

  • University of Houston

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Ceramic Matrix Composites
  • Composite Materials
  • Engineering
  • Failure Mode And Effect Analysis
  • Fiber Reinforced Composites
  • Grain Size
  • High Temperature
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.