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Journal of Composite Materials
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Design of Laminated Plates for Maximum Buckling Load

Yung S. Shin

Virginia Polytechnic Institute and State University Blacksburg, VA 24061

Raphael T. Haftka

Virginia Polytechnic Institute and State University Blacksburg, VA 24061

Layne T. Watson

Virginia Polytechnic Institute and State University Blacksburg, VA 24061

Raymond H. Plaut

Virginia Polytechnic Institute and State University Blacksburg, VA 24061

The buckling load of laminated plates having midplane symmetry is maximized for a given total thickness. The thicknesses of the layers are taken as the design variables. Buck ling analysis is carried out using the finite element method. The optimality equations are solved by a homotopy method which permits tracing optima as a function of total thick ness. It is shown that for any design with a given stacking sequence of ply orientations, there exists a design associated with any other stacking sequence which possesses the same bending stiffness matrix and same total thickness. Hence, from the optimum design for a given stacking sequence, one can directly determine the optimum design for any rearrangement of the ply orientations, and the optimum buckling load is independent of the stacking sequence.

Key Words: optimal design • laminated plate • buckling • homotopy method.

Journal of Composite Materials, Vol. 23, No. 4, 348-369 (1989)
DOI: 10.1177/002199838902300404
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M. K. Singha, L. S. Ramachandra, and J. N. Bandyopadhyay
Optimum Design of Laminated Composite Plates for Maximum Thermal Buckling Loads
Journal of Composite Materials, December 1, 2000; 34(23): 1982 - 1997.
[Abstract] [PDF]