Relation between Ultimate Pressure and Thickness of Wall of Cylindrical Pressure Vessels

Abstract

Various formulas and methods for predicting the ultimate pressure of the cylindrical pressure vessels have been investigated. However, concerning the ultimate pressure it seems that there exist some discrepancies between the experimental data and the predicted values for the thick walled cylinder though they coincide for the thin walled cylinder. In this paper, at first the experimeatal data on the ultimate pressure for various diameter ratios of mild steel and aluminium cylinders are presented, then comparisons made between the experimental data and some predicted values, and it is pointed out that the predicted value obtained from the stress-strain relation under torsion coincides well with the experiments when a new formula proposed by Nakanishi is used in our calculations as the relation between pure shear and simple shear.