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This is Fig. 6 from the 1993 PANDA2 paper.
This slide shows the postbuckling behavior of an axially compressed imperfect unstiffened flat plate with anti-symmetry (simple support) imposed along the mid-width of the plate and "moving" symmetry imposed along the two longitudinal edges of the plate.
This rather unusual representation of a flat plate is used in order to permit direct comparison of results from PANDA2 and STAGS. In PANDA2's local buckling and post-buckling model antisymmetry is imposed at the mid-width of a single discretized skin-stringer module. In this unstiffened plate case the same PANDA2 model is used except that there is no stringer.
The unstiffened plate is loaded far into its post-buckled state.
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