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Load-deflection behavior of a perfect & imperfect shell

This slide shows what might happen for the same system as that displayed on the previous slide, except this slide represents the behavior of a somewhat thinner cylindrical shell.

The governing physics and mathematics are the same as in the previous slide, except in this case the bifurcation point, B, occurs before the limit point, A, is reached. In other words, non-axisymmetric buckles start to appear before axisymmetric collapse at Point A.

There is some sensitivity to initial imperfections, that is, the maximum load-carrying capacity E of the imperfect shell (dashed line) is significantly (but not dramatically) below the load-carrying capacity B of the perfect shell.

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