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The use of an energy-based criterion to determine optimum configurations of fibrous composites

The strength optimization of laminated composites under in-plane loading is considered. An effective application of a numerical optimization method has been demonstrated for the optimum laminate configuration to maximize the in-plane strength of laminated fibrous composites. Two composite materials...

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Bibliographic Details
Published in:Composites science and technology 1999-09, Vol.59 (12), p.1891-1899
Main Authors: Barakat, S.A., Abu-Farsakh, G.A.
Format: Article
Language:English
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Summary:The strength optimization of laminated composites under in-plane loading is considered. An effective application of a numerical optimization method has been demonstrated for the optimum laminate configuration to maximize the in-plane strength of laminated fibrous composites. Two composite materials are considered in this study; boron/epoxy and carbon/epoxy. An energy-based failure criterion is used as a first-ply-failure strength criterion. The optimization algorithm is based on the sequential linear programming method with small step limits with respect to the layer thickness. Layer thicknesses and orientations are chosen as the design variables and the total thickness of the laminate is selected as the objective function. Owing to the significance of the problem, the present paper also shows the interaction among various variables such as layer thickness, layer orientation angle, in-plane loading, stresses and energy components.
ISSN:0266-3538
1879-1050
DOI:10.1016/S0266-3538(99)00048-2