The Crinkling Strength and the Bending Strength of Round Aircraft Tubing
This is a 1938 technical report from the National Advisory Committee for Aeronautics, issued through the NASA Technical Reports Server, testing how round aircraft tubing buckles under compression and bending. Its pictures are black-and-white photographs of test rigs, a specimen after loading, and a plate of stress graphs and crumpled tube samples, useful to a designer for the look of engineering documentation and of metal tubes deformed under load.
