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Photograph supplied by Michael Nemeth, NASA Langley Research Center, Hampton, Virginia
From "Bending tests of two large-diameter corrugated cylinders with eccentric ring stiffeners", by James Kent Anderson, NASA TN D-3702, November 1966
SUMMARY:
Results of bending tests on two large-diameter aluminum-alloy corrugated cylinders with eccentric (one-sided) stiffening rings are presented. The cylinders were identical except for the location of the stiffening rings; one cylinder had rings attached to the external surface of the cylinder, the other had rings attached to the internal surface. Both cylinders buckled in a general-instability mode involving buckling of the corrugated wall and reinforcing rings as a composite wall. The buckling strength of the cylinder with rings attached to the external surface was 2.3 times that of the cylinder with rings attached to the internal surface. Both cylinders buckled at approximately 79 per cent of the load predicted by the use of a small-deflection buckling theory which included the effect of stiffening ring eccentricity.
The large test rig can supply overall bending to the large specimen.
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