NDLI: Extension of ko straight-beam displacement theory to deformed shape predictions of slender curved structures

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Extension of ko straight-beam displacement theory to deformed shape predictions of slender curved structures

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fleischer, Van Tran Ko, William L.
Copyright Year	2011
Description	The Ko displacement theory originally developed for shape predictions of straight beams is extended to shape predictions of curved beams. The surface strains needed for shape predictions were analytically generated from finite-element nodal stress outputs. With the aid of finite-element displacement outputs, mathematical functional forms for curvature-effect correction terms are established and incorporated into straight-beam deflection equations for shape predictions of both cantilever and two-point supported curved beams. The newly established deflection equations for cantilever curved beams could provide quite accurate shape predictions for different cantilever curved beams, including the quarter-circle cantilever beam. Furthermore, the newly formulated deflection equations for two-point supported curved beams could provide accurate shape predictions for a range of two-point supported curved beams, including the full-circular ring. Accuracy of the newly developed curved-beam deflection equations is validated through shape prediction analysis of curved beams embedded in the windward shallow spherical shell of a generic crew exploration vehicle. A single-point collocation method for optimization of shape predictions is discussed in detail
File Size	9333645
Page Count	83
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110011037
Archival Resource Key	ark:/13960/t2993739z
Language	English
Publisher Date	2011-04-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Finite Element Method Curved Beams Stress Analysis Deformation Deflection Collocation Embedding Spherical Shells Structural Engineering Cantilever Beams Curvature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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