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Optimum Design of Composite Laminates for Strength by Ranking

Rao, KP and Issac, Jason Cherian and Viswanath, S and Murthy, Sridhara S (1991) Optimum Design of Composite Laminates for Strength by Ranking. In: Journal of Reinforced Plastics and Composites, 10 (5). 477 -494.

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Official URL: http://jrp.sagepub.com/content/10/5/477.abstract


In this paper we describe a method for the optimum design of fiber rein forced composite laminates for strength by ranking. The software developed based on this method is capable of designing laminates for strength; which are subjected to inplane and/or bending loads and optionally hygrothermal loads. Symmetric laminates only are considered which are assumed to be made of repeated sublaminate construction. Various layup schemes are evaluated based on the laminated plate theory and quadratic failure cri terion for the given mechanical and hygrothermal loads. The optimum layup sequence in the sublaminate and the number of such sublaminates required are obtained. Further, a ply-drop round-off scheme is adopted to arrive at an optimum laminate thickness. As an example, a family of 0/90/45/ -45 bi-directional lamination schemes are examined for dif ferent types of loads and the gains in optimising the ply orientations in a sublaminate are demonstrated.

Item Type: Journal Article
Publication: Journal of Reinforced Plastics and Composites
Publisher: Sage Publications
Additional Information: Copyright of this article belongs to Sage Publications.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 30 Nov 2010 08:09
Last Modified: 30 Nov 2010 08:09
URI: http://eprints.iisc.ac.in/id/eprint/34024

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