The Effective Width of Curved Sheet After Buckling
This is a 1938 NACA technical memorandum, issued by the National Advisory Committee for Aeronautics and distributed through the NASA Technical Reports Server, addressed to aircraft structural engineers. The pictures show test rigs where thin curved metal sheets were loaded in compression until they buckled, with gauges and tubing visible at the edges, plus a graph of effective width against stress ratio. A designer might take from them the crumpled, wrinkled forms that buckled sheet metal takes, shown in soft grey photographic tones with stark instrument lines.
