This and the next 5 slides are from the paper, "Optimization of panels with riveted Z-shaped stiffeners via PANDA2" by David Bushnell, AIAA 39th Structures, Structural Dynamics and Materials Conference, AIAA Paper 98-1990, April 1998; see also ADVANCES IN THE MECHANICS OF PLATES AND SHELLS, D. Durban et al, editors, pp. 79-102, Kluwer Academic Publishers, 2001. This paper is referred to as "1998 zstiffener paper" in the next several slides.
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