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An Investigation of Sheet-stiffener Panels Subjected to Compression Loads with Particular Reference to Torsionally Weak StiffenersA total of 183 panel specimens of 24ST aluminum alloy with nominal thickness of 0.020, and 0.040 inch with extruded bulb-angle sections of 12 shapes spaced 4 and 5 inches as stiffeners were tested to obtain the buckling stress and the amplitude of the maximum wave when buckled. Bulb angles from 3 to 27 1/2 inches long were tested as pin-end columns. The experimental data are presented as stress-strain and column curves and in tabular form. Some comparisons with theoretical results are presented. Analytical methods are developed that make it possible for the designer to predict with reasonable accuracy the buckling stress and the maximum-wave amplitude of the sheet in stiffened-panel combinations. The scope of the tests was insufficient to formulate general design criteria but the results are presented as a guide for design and an indication of the type of theoretical and experimental work that is needed.
Document ID
19930081539
Document Type
Other
Authors
Dunn, Louis G (California Institute of Technology)
Date Acquired
September 6, 2013
Publication Date
February 1, 1940
Report/Patent Number
NACA-TN-752
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
LOADS - COLUMNS
ALUMINUM ALLOYS - ALCLAD 24 ST
STRESSED SKIN-STIFFENER COMBINATION - COMPRESSIVE

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