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Analysis of Curved Sandwich Panels Subjected to Combined Temperature Gradient and Mechanical LoadsThe results of a detailed study of the nonlinear response of curved sandwich panels with composite face sheets and subjected to a temperature gradient through-the-thickness combined with mechanical loadings are presented. The analysis is based on a first-order shear-deformation Sanders-Budiansky type theory with the effects of large displacements, moderate rotations, transverse shear deformation and laminated anisotropic material behavior included. A mixed formulation is used with the fundamental unknowns consisting of the generalized displacements and the stress resultants of the panel. The nonlinear displacements, strain energy, principal strains, transverse shear stresses, transverse shear strain energy density, and their hierarchical sensitivity coefficients are evaluated. The hierarchical sensitivity coefficients measure the sensitivity of the nonlinear response to variations in the panel parameters, the effective properties of the face sheet layers and the core, and the micromechanical parameters. Numerical results are presented for cylindrical panels subjected to combined pressure loading, edge shortening or extension, edge shear and a temperature gradient through the thickness. The results show the effects of variations in the loading and the panel aspect ratio, on the nonlinear response and its sensitivity to changes in the various panel, effective layer and micromechanical parameters.
Document ID
19980019031
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Noor, Ahmed K.
(NASA Langley Research Center Hampton, VA United States)
Starnes, James H., Jr.
(NASA Langley Research Center Hampton, VA United States)
Peters, Jeanne M.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Stability Analysis of Plates and Shells
Subject Category
Structural Mechanics
Report/Patent Number
AIAA Paper 97-1246
Funding Number(s)
CONTRACT_GRANT: NAG1-1162
CONTRACT_GRANT: F49620-96-1-0462
Distribution Limits
Public
Copyright
Public Use Permitted.
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