04.1 - Aerospace Grade Materials, Structural Analysis, Fatigue and Damage Tolerance
TOWARDS EFFICIENT ANALYSIS OF POSTBUCKLING IN AIRCRAFT STIFFENED STRUCTURES
M.H. Elalfy¹, R. de Breuker¹, S.G.P. Castro¹; ¹TU Delft, Netherlands
This paper introduces a new computationally efficient tool to predict postbuckling behavior in thin-walled aircraftrnstructures, particularly stiffened plates. Focusing on the critical transition where local buckling alters loadrndistribution but retains the structure’s load-carrying capacity. The proposed postbuckling analysis tool employsrna semi-analytical approach based on the Rayleigh-Ritz method and the perturbation approach. By assumingrna displacement field through Ritz Method and utilizing hierarchical polynomials, this tool seeks to overcomernlimitations in existing methodologies. The integration of hierarchical polynomials aims to enhance versatilityrnand computational efficiency, enabling its application across a wide range of structural configurations andrnboundary conditions. The enhancement in computational efficiency, additionally, provides substantial benefitsrnto the design and optimization processes.