The limit of stability of a curved plate strip under shear and axial stresses
This is a 1939 NACA technical memorandum from the NASA Technical Reports Server, written by aeronautical engineers for other engineers and researchers studying structural stability. Its pictures are engineering line diagrams: a curved plate strip under shear and axial loads with arrows marking the stresses, a shell displacement sketch with a force diagram, a section-forces diagram of a curved plate element, and a plotted stability curve with labelled axes and curves. A designer might take from them the clean technical line style, dense arrow notation, and sparse grey-and-black palette typical of early engineering drawings.
