Abstract
ABSTRACT The nonlinear buckling of cone-segmented cylinders under external pressure has been investigated. The cylinders include four nominally identical cones and their slant angles ranged from 0°–20° in every 1° increments. Note that the cylinder with a 0° slant angle forms a circular cylinder that is used for comparisons. Two nominally identical cone-segmented and circular cylinders have been fabricated, manufactured, measured, and tested. The numerical simulations for these cylinders are in good agreement with their experimental counterparts. Both linear and nonlinear buckling behaviours of the cylinders have also been evaluated, and the optimal slant angle can then be identified to be 6°–8°. These optimal imperfect cylinders yield buckling loads 1.7–2.8 times greater than those of an imperfect equivalent circular cylinder. Our results reveal a new finding that the average buckling load of the cone-segmented cylinders is approximately 2.3 times that of the equivalent circular cylinders.
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