Accession Number : ADA289430

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

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Foringer, Mark A.

PDF Url : ADA289430

Report Date : DEC 1994

Pagination or Media Count : 105

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.

Descriptors :   *METAL MATRIX COMPOSITES, *TITANIUM ALLOYS, VISCOPLASTICITY, THERMOMECHANICS, MATHEMATICAL MODELS, LINEAR SYSTEMS, STRESS ANALYSIS, COMPOSITE MATERIALS, LAMINATES, DAMAGE ASSESSMENT, FIBER REINFORCED COMPOSITES, THESES, STRAIN(MECHANICS), FATIGUE(MECHANICS), TITANIUM, MICROMECHANICS.

Subject Categories : Laminates and Composite Materials
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE