Type of Document	Master's Thesis
Author	Hopper, Robert Huston
URN	etd-04182009-041218
Title	Composite circular braid mechanics
Degree	Master of Science
Department	Engineering Mechanics
Advisory Committee	Advisor Name Title Grant, John Wallace Committee Chair Griffin, Odis Hayden Jr. Committee Member Popper, Peter Committee Member Ragab, Saad A. Committee Member
Keywords	Braid theory
Date of Defense	1991-08-15
Availability	restricted
Abstract Braided composites find many diverse applications in modern technology and tailoring the mechanical properties of these structures has become increasingly important. This thesis will examine one class of circular braids encompassing an elastic core. By hypothesizing four modes of operation and incorporating primary influences, the mechanical response of the composite is predicted based on its initial parameters and material properties. The ability to model the yarns that constitute the braid as nonlinear materials enables the simulated response to span finite deformations. A scheme for nondimensionalizing the model parameters and governing equations for each mode of operation is also proposed and implemented. In an effort to validate the assumptions underlying the model's formulation, a series of experimental trials are documented that verify the fundamental braid mechanics. A wide variety of analytical cases are also introduced to investigate the influences of various model parameters. Possible extensions for the existing model are also noted.
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