Tension Fields in Originally Curved, Thin Sheets During Shearing Stresses
This is a 1935 NASA technical report on tension fields forming in thin, originally curved sheets under shear, issued for aeronautical engineers and structural analysts. Its two pictures are graphs of stress-field curves plotted against angle alpha on a cotangent scale, labelled 'Closely spaced longitudinals' and 'Closely spaced rings', showing families of curves that fan out and converge across a grid. A designer could take from them the restrained look of technical nomograph plots, with dense curve families, ruled grids and small handwritten-style labels set against cream paper.
