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Zbl 0662.73069
Sun, G.; Hansen, J.S.
Optimal design of laminated-composite circular-cylindrical shells subjected to combined loads. (English)
[J] J. Appl. Mech. 55, No.1, 136-142 (1988). ISSN 0021-8936; ISSN 1528-9036/e

Optimization of the buckling load of a laminated-composite, circular- cylindrical shell subjected to axial compression, external pressure, torsion, or a combination thereof is undertaken. In the optimization procedure it is assumed that the shell has a fixed weight (length, radius and thickness); the buckling load is taken as the objective function which is maximized by adopting the lamina fiber orientations as the optimizing parameters. For the shell analysis a perturbation approach is used and the boundary conditions and nonlinear prebuckling effects are included; the analysis yields both the buckling load and the post- buckling character of the shell. The procedure developed is demonstrated for eight loading configurations. In addition, selected laminates were chosen for an experimental programme involving a series of graphite/epoxy shells. The predicted analytical and the measured experimental buckling loads are in very good agreement.

MSC 2000:: *74P99 Optimization solid mechanics
74G60 Bifurcation and buckling
74K15 Membranes

Keywords: finite-length four-ply graphite/epoxy cylinder; finite difference; solution to van Kármán-Donnell shell equations; buckling load; axial compression; external pressure; torsion; perturbation approach; nonlinear prebuckling effects; post-buckling

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Zentralblatt MATH Berlin [Germany]