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From the same paper as the previous 3 images.
Photograph supplied by Michael Nemeth, NASA Langley Research Center, Hampton, Virginia
Buckling of internally isogrid-stiffened axially compressed Lexan cylindrical shell. The isogrid spacing is much smaller than that displayed in the previous slide. The buckling half-wavelength is significantly longer relative to the isogrid stiffener spacing than that for the buckling pattern shown in the previous slide. This is definitely a general buckling pattern.
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