The Layerwise Shell Theory is used to model discretely stiffened laminated composite plates and cylindrical shells for stress, vibration, pre-buckling and post-buckling analyses. The layerwise theory reduces a 3-D problem to a 2-D problem by expanding the 3-D displacement field as a function of a surface-wise 2-D displacement field and a 1-D interpolation polynomial through the shell thickness....

Abstract— The present study is devoted for the development of a mathematical model to predict the structural behavior and critical pressure of composite cylindrical shell under external pressure using finite element analysis. The composites can be tailored to match the external loading. The effect of fibre orientation angle along with stacking sequence of the composites on the loading carrying ...

This paper explores the effect of different modelling strategies to represent geometrical imperfections and joints in flat thin-walled stiffened panels during buckling post-buckling. Compression tests were performed on aircraft grade aluminium alloy jointed L-shape stiffeners using rivets with digital image correlation used monitor out-of-plane deformations, mode shape changes failures such as ...

Abstract We consider a family of three-dimensional stiffened plates whose dimensions are scaled through different powers small parameter $\varepsilon $ ε . The plate and the stiffener assumed to be linearly elastic, isotropic, homogeneous. By means $\Gamma Γ -convergence, we study asymptotic ...

This paper aims at investigating the optimum location of a single longitudinal stiffener having various cross-section types steel plate girders subjected to bending loading. The is found using gradient-based Interior-Point (IP) optimization algorithm. procedure involves linear elastic buckling analysis with finite element method, which coupled aforementioned IP algorithm and used calculate coef...