Title and abstract from a 2005 PANDA2 paper about panels with major stiffeners and sub-stiffeners in the bays between adjacent major stiffeners

This and the next 9 slides pertain to the paper, "Optimum design of stiffened panels with substiffeners" by David Bushnell and Charles Rankin, AIAA 46th Structures, Structural Dynamics, and Materials Conference, Paper no. AIAA-2005-1932, 2005, referred to as "2005 substiff paper" in the next 9 slides because those slides are about cylindrical shells and cylindrical panels with major rings and major stringers and with sub-rings and sub-stringers attached to the skin in the bays between adjacent major stiffeners.

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