Flattening Effect of Negative Gaussian Curvature on Simply Supported Thick Asymmetric Cross-Ply Panels in the Absence of Surface-Parallel Edge Restraints
Publication: Journal of Aerospace Engineering
Volume 33, Issue 6
Abstract
This paper investigated the flattening effect of negative Gaussian curvature on simply supported (SS) thick asymmetrically laminated cross-ply panels in the absence of surface-parallel edge restraints. A higher-order shear deformation theory (HSDT) was employed to model the thick laminated cross-ply saddle-shaped shell with a square planform under consideration. The resulting boundary-value problem comprising a system of five highly coupled partial differential equations, in conjunction with the SS1-type (i.e., with no surface-parallel boundary constraints) simply supported boundary condition prescribed on all four edges, is solved by employing a boundary-discontinuous double Fourier series approach. Of particular importance are heretofore unavailable numerical results pertaining to the effects of panel Gaussian curvature, surface-parallel edge constraints, lamination sequence, and thickness effects, as well as their intricate interactions. Interaction of the membrane action due to negative Gaussian curvature with the higher-order (respectively, first-order) bending-stretching coupling producing beam–column- and tie bar–type softening/hardening effects in thick (respectively, thin) cross-ply panels also constitute an important focus of this investigation. These results serve as benchmarks for numerical techniques such as finite-element and boundary element methods.
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Data Availability Statement
Some or all data, models, or code generated or used during the study may be deemed proprietary or confidential in nature and may only be provided with restrictions.
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 6 • November 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Oct 6, 2016
Accepted: Feb 26, 2020
Published online: Jul 29, 2020
Published in print: Nov 1, 2020
Discussion open until: Dec 29, 2020
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