Title page for ETD etd-04182009-041218
|Type of Document
||Hopper, Robert Huston
||Composite circular braid mechanics
||Master of Science
|Grant, John Wallace
|Griffin, Odis Hayden Jr.
|Ragab, Saad A.
|Date of Defense
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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