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This is Fig. 23 from the 1987 PANDA2 paper. This slide shows a comparison of axial strain at a local buckle peak from test, STAGSC-1 analysis, and PANDA2 analysis for an axially compressed, tee-stiffened, graphite-epoxy flat panel loaded well into its post-local-buckling state.
(from Computers & Structures, Vol.25, No.4, pp. 469-605, 1987)
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