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Stress Analysis of Composite Cylindrical Shells with an Elliptical CutoutA special-purpose, semi-analytical solution method for determining the stress and deformation fields in a thin laminated-composite cylindrical shell with an elliptical cutout is presented. The analysis includes the effects of cutout size, shape, and orientation; non-uniform wall thickness; oval-cross-section eccentricity; and loading conditions. The loading conditions include uniform tension, uniform torsion, and pure bending. The analysis approach is based on the principle of stationary potential energy and uses Lagrange multipliers to relax the kinematic admissibility requirements on the displacement representations through the use of idealized elastic edge restraints. Specifying appropriate stiffness values for the elastic extensional and rotational edge restraints (springs) allows the imposition of the kinematic boundary conditions in an indirect manner, which enables the use of a broader set of functions for representing the displacement fields. Selected results of parametric studies are presented for several geometric parameters that demonstrate that analysis approach is a powerful means for developing design criteria for laminated-composite shells.
Document ID
20080006848
Document Type
Preprint (Draft being sent to journal)
Authors
Oterkus, E. (Arizona Univ. Tucson, AZ, United States)
Madenci, E. (Arizona Univ. Tucson, AZ, United States)
Nemeth, M. P. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2007
Subject Category
Structural Mechanics
Funding Number(s)
WBS: WBS 732759.07.11
Distribution Limits
Public
Copyright
Public Use Permitted.

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