The buckled large corrugated and internally ring-stiffened cylindrical shell shown on the previous slide

Photograph supplied by Michael Nemeth, NASA Langley Research Center, Hampton, Virginia

From "Bending tests of large-diameter ring-stiffened corrugated cylinders", by James P. Peterson and James Kent Anderson, NASA TN D-3336, March 1966

This is a general instability buckling mode shape.

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