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Fig. A19 from the 2014 GENOPT paper.
A HUGEBOSOR4 model of 90 degrees of the optimized uniformly axially compressed truss-core sandwich aluminum cylindrical shell “equivalent” to the complexly corrugated cylindrical shell of the type shown in Fig. 33. This “huge” prismatic model includes all the little shell segments, some of which can be seen in the much smaller BIGBOSOR4 model displayed in the top two frames of Fig. 37 (4 slides ago). The 1434 individual little shell segments cannot be seen in this model because they are too small. This shell was re-optimized with HUGEBOSOR4. The new design: pitch of truss = 1.927 inches; width of truss-core crown = 0.3127 inch; height of truss-core sandwich = 1.142 inch; thickness of truss core sheet = 0.02720 inch; thickness of each face sheet = 0.03495 inch; new weight/area = 0.01158 lb/in2, very close to the old weight/area = 0.01159 lb/in2 given in Fig. 37 (4 slides ago). General and local buckling occur at load factors very close to 1.5 (the specified factor of safety).
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