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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; nonuniform 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
20050199070
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Nemeth, M. P.
(NASA Langley Research Center Hampton, VA, United States)
Oterkus, E.
(Arizona Univ. Tucson, AZ, United States)
Madenci, E.
(Arizona Univ. Tucson, AZ, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2005
Subject Category
Composite Materials
Report/Patent Number
AIAA Paper 2005-1824
Meeting Information
Meeting: 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Location: Austin, TX
Country: United States
Start Date: April 18, 2005
End Date: April 21, 2005
Sponsors: American Inst. of Aeronautics and Astronautics, Alpha STAR Corp., American Society of Civil Engineers, American Society of Mechanical Engineers, American Helicopter Society, Inc.
Funding Number(s)
OTHER: 23-376-70-30-30
Distribution Limits
Public
Copyright
Public Use Permitted.
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