Twisting failure of centrally loaded open-section columns in the elastic range
This is a 1938 NASA technical report on the elastic twisting failure of centrally loaded open-section columns, a structural engineering text written for aircraft and airframe designers. Its pictures are dense engineering graphs of stress ratios, shear centre positions and buckling curves for thin-walled channel and U-section members, with plotted curves, labelled axes and small cross-section sketches. A designer might borrow the clean grid-and-curve layout and the tidy technical diagram style for infographic or chart work.
