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Title: Optimal design of symmetric angle-ply laminates subject to nonuniform buckling loads and in-plane restraints
Authors: Walker, Mark 
Adali, Sarp 
Verijenko, Viktor E. 
Issue Date: 1996
Publisher: Elsevier
Optimal buckling designs of symmetrically laminated rectangular plates under in-plane uniaxial loads" which have a nonuniform distribution along the edges are presented. In particular, point loads, partial uniJorm loads and nonuniform loads" are considered in addition to uniform O' distributed inplane loads" which provide the benchmark solutions. Poisson's effect is" taken into account when in-plane restraints are present along the unloaded edges. Restraints give rise to in-plane loads" at unloaded edges which lead to
biaxial loading, and may cause premature instability. The laminate behaviour with respect to fiber orientation changes significantly in the presence of Poisson's eJfi, ct as compared to that o/'a laminate where this" ~Jfect is neglected. This change in behaviour has significant implications Jor design optimisation as the optimal values of design variables with or without restraints differ substantially. In the present study, the design objective is" the maximisation of the uniaxial buckling load by optimally determining
the fiber orientations. The )qnite element method, coupled with an optimisation
routine, is employed in analysing and optimising the laminates. Numerical results are given for a number of boundary conditions and fi)r uniJormly and non-uniformly distributed buckling loads.
Originally published in: Thin-Walled Structures, Vol. 26, No. 1, 1996.
DOI: 10.1016/0263-8231(96)00002-X
Rights: The electronic version of the article published in Thin-Walled Structures 1996, 26(1): 45-60 © 1996 copyright Elsevier. Thin-Walled Structures available online at:
Appears in Collections:Research Publications (Engineering and Built Environment)

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