Failure Mechanisms in a Quasi-Isotropic Ceramic Composite Laminate under Tensile Fatigue Loading

Abstract

A study was conducted to experimentally investigate the tensile fatigue damage mechanisms in a quasi-isotropic ceramic matrix composite (Corning's Nicalon/CASIII). The goals of this study were to (1) develop a grip fixture for a servo-hydraulic MTS test machine and (2) conduct a series of tests with (0/-45/90)s specimens subjected to tensile fatigue loading to study their fatigue damage growth mechanisms. Results showed that when the material was subjected to stresses below 90 MPa, it lasted over 1000000 cycles but when stressed at or above 90 MPa, it failed in less than 1000 cycles. (JHD)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA230470

Entities

People

  • Gregory D. Tracy

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Ceramic Matrix Composites
  • Composite Materials
  • Elastic Properties
  • Engineering
  • Failure Mode And Effect Analysis
  • High Temperature
  • Laminates
  • Materials Laboratories
  • Measurement
  • Mechanics
  • Modulus Of Elasticity
  • Polymer Matrix Composites
  • Silicon Carbide
  • Stiffness
  • Stress Strain Relations
  • Test Stands

Readers

  • Structural Health Monitoring of Composite Structures.