Stresses around rectangular cut-outs in skin-stringer panels under axial loads - II
By: by Paul Kuhn, John E. Duberg, and Simon H. Diskin
Contributors: Duberg, John E. (John Edward), 1917-; Diskin, Simon H.; Langley Aeronautical Laboratory; United States. National Advisory Committee for Aeronautics
Series: NACA WR -- L-368
Publisher: Langley Memorial Aeronautical Laboratory
Published: 1943
Place of publication: Langley Field, VA
Language: eng
Number of pages: 46
ISBN-13: 9781680156485
Subjects: Strains and stresses; Aerodynamics; Research; Contraintes (Mécanique); Aérodynamique; Recherche
Other titles: NACA wartime reports
Description: Cut-outs in wings or fuselages produce stress concentrations that present a serious problem to the stress analyst. As a partial solution of the general problem, this paper presents formulas for calculating the stress distribution around rectangular cut-outs in axially loaded panels. The formulas are derived by means of the substitute-stringer method of shear-lag analysis. In a previous paper published under the same title as the present one, the analysis had been based on a substitute structure containing only two stringers. The present solution is based on a substitute structure containing three stringers and is more complete as well as more accurate than the previous one. It was found that the results could be used to improve the accuracy of the previous solution without appreciably reducing the speed of calculation. Details are given of the three-stringer solution as well as of the modified two-stringer solution.
Notes: "Originally issued October 1943 as Advance Restricted Report 3J02."

"NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were previously held under a security status but are now unclassified. Some of these reports were not technically edited. All have been reproduced without change in order to expedite general distribution."

Includes bibliographical references (page 44).

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