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This and the next two slides are from the paper, "Optimum design of composite stiffened panels under combined loading, by David Bushnell and William D. Bushnell, Computers & Structures, Vol.55, No. 5, pp. 819-856, 1995, called "1995 PANDA2 paper" in the next two slides.
This slide shows Fig. 25 of the 1995 PANDA2 paper.
Displayed here is a plan view of an undeformed and deformed STAGS finite element model of a T-stiffened flat panel previously optimized by PANDA2 for the load combination: axial compression, Nx = -500 lb/in, in-plane shear, Nxy = 500 lb/in and normal pressure, p = 5.0 psi. The pressure is applied to the skin surface opposite to that to which the stiffeners are attached.
The in-plane loading components, Nx and Nxy, are shown, as well as the boundary conditions for the case in which the two edges parallel to the T-shaped stringers (longitudinal edges) are prevented from warping in the plane of the panel skin.
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