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Postbuckling optimisation of a variable angle tow composite wingbox using a multi-modal Koiter approach

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Show simple item record Liguori, Francesco Zucco, Giovanni Madeo, Antonio Magisano, Domenico Leonetti, Leonardo Garcea, Giovanni Weaver, Paul M. 2019-03-21T15:20:46Z 2019
dc.description peer-reviewed en_US
dc.description The full text of this article will not be available in ULIR until the embargo expires on the 14/02/2021
dc.description.abstract The stiffness-tailoring capability of Variable Angle Tow (VAT) laminates gives enhanced freedom to design thin-walled structures. One key advantage of tow steering is the ability to redistribute stresses improving buckling performance, leading to reduction in material weight and costs. The aim of this work is to optimise the initial postbuckling behaviour of a recently proposed VAT composite wingbox. The optimisation process is based on a fibre path parameterisation. It involves seeking the stacking sequence that minimises the displacements occurring in the postbuckling regime. This problem is solved by coupling the multi-modal Koiter asymptotic approach implemented with a solid-shell Finite Element environment through stochastic optimisation strategies. Results obtained regarding different optimisation scenarios show a much improved performance for the buckling and postbuckling response of the wingbox with respect to the initial VAT design. Additionally, manufacturing constraints are readily included in the optimisation program. The possibility of performing an efficient and robust optimisation process of a complex structure with a multi-modal Koiter asymptotic approach is demonstrated, showing its viability as a design tool for buckling dominated structures. A parametric study regarding the influence of steering radii shows that overcoming the current manufacturing constraint on minimum radius is worthy of investigation. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation 15RP2773 en_US
dc.relation.ispartofseries Thin Walled Structures;138, pp. 183-198
dc.rights This is the author’s version of a work that was accepted for publication in Thin Walled Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin Walled Structures, 2019, 138, pp. 183-198, en_US
dc.subject wingbox en_US
dc.subject variable angle tow laminates en_US
dc.subject postbuckling optimisation en_US
dc.subject Koiter method en_US
dc.subject finite element method en_US
dc.title Postbuckling optimisation of a variable angle tow composite wingbox using a multi-modal Koiter approach en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.tws.2019.01.035
dc.identifier.local VARICOMP
dc.contributor.sponsor SFI en_US
dc.relation.projectid 15/RP/2773 en_US 2021-02-14
dc.embargo.terms 2021-02-14 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US

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