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buckled ring-stiffened externally pressurized cylindrical shells

This and the next three slides show the buckling behavior of perfect and imperfect stiffened shells. This slide exhibits the buckling behavior of ring-stiffened cylindrical shells under uniform external hydrostatic pressure.

(a) local axisymmetric collapse between very sturdy rings;

(b) local non-axisymmetric buckling between medium rings;

(c) general buckling in a specimen with small rings.

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