HyperSizer Published Paper


"Local Post Buckling: An Efficient Analysis Approach for Industry Use" (23 pages)

Authors:

Craig Collier, Phil Yarrington, Pete Gustafson, and Brett Bednarcyk

Abstract:

Aerospace metallic and composite laminate stiffened panels also called “skinstringer panels” are designed to support load beyond local buckling of the skin. This design approach requires a method to quantify post buckled collapse strength of the panel. This paper presents an accurate and computationally efficient analysis method intended for broad industry usage based on a rapid, iterative convergence of both the ‘effective width’ of unbuckled skin and convergence of the updated overall panel stiffness and resulting internal load redistribution. The method is implemented into the HyperSizer® software. Verifications to Abaqus® non-linear FEA and validations to test data are included.

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