POST - BUCKLING BEHAVIOR OF STIFFENED CURVED PANEL USING ARC LENGTH METHOD

Abstract: In this research work, numerical investigations were carried out for the stiffened panel using finite element- based code. Stiffened panels with various panel radius and stiffener types are considered under uniaxial compression load. The present study is focused on the investigation of the buckling load and ultimate load for the stiffened panel using the load-shortening plots. To predict the critical buckling load and mode shape for the first buckling modes of the stiffened panel have been obtained by the Linear Eigen Value Extraction method. The failure load of the stiffened curved panel after buckling was predicted by using STATIC Riks (arc length) method. Initial geometrical imperfections and nonlinearities of the materials were considered for better results. When the panel radius is increased with constant plate thickness, the buckling load and ultimate load decreases constantly. The stiffened panel with Hat-shape has a higher load carrying capacity compared to the other shapes (I-Shape and J-Shape). The methodology used in this study has good agreement with reference to experimental studies

Keywords: Stiffened panel, Buckling load, Ultimate load, Panel radius, Arc length method.