Title page for ETD etd-07282008-134259
|Type of Document
||Averill, Ronald C.
||Nonlinear analysis of laminated composite shells using a micromechanics-based progressive damage model
|Reddy, Junuthula N.
|Griffin, Odis Hayden Jr.
|Hendricks, Scott L.
|Johnson, Eric R.
|Mook, Dean T.
|Date of Defense
A micromechanics-based model for progressive failure analysis of laminated composite
shell structures has been developed and implemented. The model couples a finite
element model for nonlinear analysis of laminated shells with a micro mechanics elasticity
solution for predicting failure and effective composite properties. The nonlinear laminate
theory and finite element model are based on a third-order expansion of displacements
through the thickness of the shell, thus allowing for both transverse normal and
shearing deformations. The initiation and evolution of damage in the shell is modeled
at the constituent (i.e., fiber, matrix, interphase) level using an elasticity solution for
quasi-three-dimensional hygro-thermo-mechanical loading of continuous fiberreinforced
composites. The model is used to predict failure in laminated composite
structures and to study the effects of constituent properties (stiffness and strength) on
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