Analytical calculation of local buckling and post-buckling behavior of isotropic and orthotropic stiffened panels

作者：Stamatelos D G; Labeas G N^*; Tserpes K I

来源：Thin-Walled Structures, 2011, 49(3): 422-430.

DOI：10.1016/j.tws.2010.11.008

• Analytical solution
• Energy solution
• Stiffened panel
• Elastic restraint edge
• Local buckling
• Post-buckling

A methodology for the analytical assessment of local buckling and post-buckling behavior of isotropic and orthotropic stiffened plates is presented. The approach considers the stiffened panel segment located between two stiffeners, while the remaining panel is replaced by equivalent transverse and rotational springs of varying stiffness, which act as elastic edge supports. A two-dimensional Ritz displacement pb-2 Ritz) is utilized in the solution of the local buckling problem of isotropic and laminated symmetric composite panels with arbitrary edge boundary conditions. The buckling analysis of the segment provides an accurate and conservative prediction of the panel local buckling behavior. Consequently, the developed methodology is extended in the prediction of the post-buckling response of stiffened panels of which the skin has undergone local buckling. Of high importance for the calculation of the post-buckling behavior is the selection of appropriate boundary conditions for the structural members analyzed. A comparison of the present methodology results to respective finite element (FE) results has shown a satisfactory agreement.

• 出版日期2011-3