Buckling of Hydroformed Toroidal Pressure Hulls with Octagonal Cross-Sections

This paper is devoted to the hydroforming performances of toroidal pressure hulls with octagonal cross-sections, together buckling hydroformed hulls. The cross-sections preforms are inscribed from circular perfect shells a 150 mm major radius, 75 section and 1.058 wall thickness. nonlinear finite-element method was employed study under various pressures. To verify numerical findings, three nominally identical discrete were tentatively manufactured, internally hydroformed, externally collapsed. experimental data exhibited satisfactory agreement. It indicated that technique could greatly enhance loading capacity