Strength in Shear of the Thin Curved Sheets of Alclad
This is a 1930 NACA technical note, Technical Note No. 343, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers, reporting shear strength tests on thin curved Alclad aluminium sheets made at the Mechanical Laboratory of the University of California. The pictures show a photographed test rig with its lever arm and slide guide, a line drawing of the frame, a graph of shear load against sheet thickness, and rows of tested panels with rivet-line failures. A designer could take the stark, measured engineering-drawing look: pale grey metal panels, fine dotted rivet lines, and plain black line diagrams with simple labels.
