Viscoplastic Characterization and Fatigue Modeling of Titanium Based Metal Matrix Composites.

Abstract

Viscoplastic characterization and fatigue modeling of titanium-based metal matrix composites was accomplished by combining a unified viscoplastic theory, a nonlinear micromechanics model, and a linear damage accumulation model. First. Ti 15-3 was characterized using the Bodner-Partom viscoplastic theory. A micromechanics model was then employed in a linear damage accumulation fatigue model to predict the fatigue behavior of titanium based composites. The viscoplastic behavior predictions of the micromechanics model were used to eliminate separately defined time dependent terms in the fatigue model. Also, a new linear damage accumulation model was developed from the fatigue behavior of the composite constituents. Finally, it was found that the microstresses in the 0 degree ply could be used to accurately predict the fatigue behavior of a laminate containing these plies.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA289430

Entities

People

  • Mark A. Foringer

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Space

DTIC Thesaurus Topics

  • Composite Materials
  • Elastic Properties
  • Fatigue Life
  • Laminates
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Metal Matrix Composites
  • Micromechanics
  • Physical Properties
  • Plastic Properties
  • Reliability
  • Stress Strain Relations
  • Stresses
  • Tensile Strength

Readers

  • Computational Modeling and Simulation
  • Structural Health Monitoring of Composite Structures.