Cutout Reinforcement of Stiffened Cylindrical Shells.

Abstract

A study was carried out to determine the optimum placement and volume of a reinforcing frame around a cutout in an axially loaded stringer and ring and stringer stiffened cylindrical shell. The problem was analyzed using the linear bifurcation portion of STAGS (Structural Analysis of General Shells). Four parameters were varied; stringers versus rings and stringers, cutout size, ratio of frame volume to cutout volume, and frame position. It appeared that in most cases the position with the frame next to the cutout edge was the most effective. This can be attributed to the frame's ability to delay the onset of local buckling. However, there was a relative maximum in the frame distance versus critical load curves for a frame positioned away from the cutout edge at a low ratio of frame to cutout volume. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1977
Accession Number
ADA039162

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  • James Anthony Cervantes

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  • Air Force Institute of Technology

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