Abstract
Grillage topologies are commonly used in many composite structural applications to produce low mass designs that have a high stiffness. While composite failure criteria are being compared in many different simple structures, for example plates and tubes, literature must also compare more complicated applications, including grillages, as there are distinct differences in behaviour. This paper therefore performs analysis of grillage structures with more up to date failure criteria, taken from the world wide failure exercise, than previously investigated. The grillage theory selected is that of Navier theory with elastic equivalent properties due to its low computational expense for use with a genetic algorithm to optimise a composite structure. The results take an example from leisure boatbuilding showing the grillages produced from the different limit states, comparing the cost and mass. The final results show that the method allows a rapid analysis of grillages and that the selection of the limit state has an important effect on the optimised grillage topology.
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Sobey, A., Blake, J. & Shenoi, R. Implications of failure criteria choices on the rapid concept design of composite grillage structures using multiobjective optimisation. Struct Multidisc Optim 47, 735–747 (2013). https://doi.org/10.1007/s00158-012-0875-4
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DOI: https://doi.org/10.1007/s00158-012-0875-4