Some investigations of the general instability of stiffened metal cylinders

An experimental investigation of the general instability of reinforced thin-walled metal cylinders was carried out at the California Institute of Technology. The basic parameters involved were the spacing and sectional properties of stiffening elements, the wall thickness, and the diameter of the cylinder. An analysis of the experimental data led to a suitable parameter for estimating the general-instability stress of reinforced metal cylinders when subjected to pure torsion loading.