Buckling and postbuckling behavior of eccentrically stiffened laminated cylinders
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The buckling and postbuckling of stiffened laminated cylinders under uniform axial compression is investigated to determine the effects of shell lamination scheme and stiffeners on the reduced load-carrying capacity. The effect of geometric imperfection is also included. The analysis is based on the layerwise shell theory of Reddy for simply-supported, cross-ply laminated circular cylinders, and the `smeared stiffener' technique is used to account for the stiffener stiffness. The Rayleigh-Ritz method is used to reduce the continuum problem to a set of nonlinear algebraic equations, which are then solved using the Riks-Wempner iterative technique. Numerical results for stiffened and unstiffened, cross-ply laminated, simply-supported cylinders are to the number of nearly simultaneous buckling modes.