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Bend-free design of super ellipsoids of revolution composite pressure vessels

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Show simple item record Daghighi, Shahrzad Zucco, Giovanni Rouhi, Mohammad Weaver, Paul M. 2021-02-08T16:07:21Z 2020
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 02/04/2022
dc.description.abstract Shells are thin-walled curved structures that are widely used in many engineering applications because of their structural performance in reacting transverse loads via generating membrane stresses. However, bending deformations and stresses are also generated, yet, alleviating them can result in more efficient use of material and improvement of load carrying capacity of shells. Ideally, a bend-free design provides scope for exploiting the full potential of load carrying in shell structures because of the uniform load distribution through the thickness. In this study, a family of so-called super ellipsoids of revolution are designed to have bend-free states under uniform internal pressure. Super ellipsoids of revolution have several advantages compared to conventional geometries such as higher packing efficiency, smoother stress flow variation, alleviating stress concentrations and cost associated with assembly processes. In this work, a new generalised set of governing equations representing bend-free states in composite super ellipsoids of revolutions are developed and solved analytically. Stiffness tailoring via tow steering is used to realise bend-free states. A parametric study is performed on several super ellipsoids of revolution for finding the required distribution of fibre orientations. The analytical solution is verified by finite element modelling and results are compared with an isotropic baseline. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Composite Structures;245, 112283
dc.rights This is the author’s version of a work that was accepted for publication in Composite 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 Composite Structures, 245, 112283, en_US
dc.subject variable stiffness en_US
dc.subject bend-free en_US
dc.subject super ellipsoid en_US
dc.subject pressure vessel en_US
dc.subject composite en_US
dc.title Bend-free design of super ellipsoids of revolution composite pressure vessels 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.compstruct.2020.112283
dc.contributor.sponsor SFI en_US
dc.relation.projectid 15/RP/2773 en_US 2022-04
dc.embargo.terms 2022-04/02 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US

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