This is Fig. 7 from the paper, "BOSOR5 - Program for buckling of elastic-plastic complex shells of revolution including large deflections and creep", by David Bushnell, Computers & Structures, Vol. 6, pp.221-239. 1976.
This slide shows bifurcation buckling modes and pressures predicted by BOSOR5 and comparison with Galletly's test results for the specimens with the 45-degree, 60-degree and 75-degree conical end.
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