Date of Award

11-1993

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

First Advisor

Shankar Mall, PhD

Abstract

In this study, a three-dimensional micromechanics model is developed. The present capabilities of the model include both unidirectional and laminated composite layups with various types of nonlinear analysis such as a thermoelastic-plastic analysis employing the Prandtl-Reuss flow relations, a thermoviscoplastic analysis using Bodner-Partom unified constitutive theory, and an interfacial damage progression scheme based on a statistical interfacial failure criteria. Such nonlinearities are critical factors during thermomechanical fatigue TMF loading of high temperature composites. Solutions were obtained and extensive comparisons performed with existing micromechanics models, finite element analysis, and experiment with excellent results. In addition, the analysis was developed to require minimal computer resources. For instance, the majority of problems may be accomplished on a personal computer in a matter of seconds.

AFIT Designator

AFIT-DS-AA-93-3

DTIC Accession Number

ADA273772

Comments

The author's Vita page is omitted.

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