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Thermoplastic composite stiffener design with manufacturing considerations

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Show simple item record Peeters, Daniël Clancy, Gearóid J. Oliveri, Vincenzo O'Higgins, Ronan M. Jones, David Weaver, Paul M. 2018-01-29T15:43:51Z 2018-01-29T15:43:51Z 2018
dc.description peer-reviewed en_US
dc.description.abstract Fiber reinforced composite materials are finding increasing application in aerospace structures due to their superior specific properties. Aerospace structures make widespread use of stiffening elements, such as stringers, for example in the wingbox or the fuselage. Sizing of stiffeners to full strength, stiffness and manufacturing considerations is a significant challenge for aircraft designers. This paper proposes a novel manufacturing approach using winding and laser-assisted tape placement (LATP) to manufacture an omega-shaped stiffener. The stiffener design is used as the stiffening elements in a wingbox; the sizing of the stringer is based on the optimized buckling response of the wingbox, with manufacturing constraints also taken into consideration. The stringer is manufactured by LATP winding over a novel collapsible tool. The tool utilizes a low-melt alloy as a spacer, which can be removed post-process by exposing the mold to the alloy melt temperature, which is below the glass transition temperature of the thermoplastic composite material. Manufacturing tests have shown that using the new mold design leads to repeatable sti eners of the correct dimensions. Characterisation tests have shown that the strength of the corners has to be checked in future work. The bond strength of the stiffeners is satisfactory. en_US
dc.language.iso eng en_US
dc.publisher American Institute of Aeronautics and Astronautics: AIAA en_US
dc.relation.ispartofseries 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech Forum;(2018-0479)
dc.subject fiber reinforced composite materials en_US
dc.subject aerospace structures en_US
dc.subject LATP en_US
dc.title Thermoplastic composite stiffener design with manufacturing considerations en_US
dc.type info:eu-repo/semantics/conferenceObject en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.2514/6.2018-0479
dc.contributor.sponsor SFI en_US
dc.relation.projectid 15/RP/2773 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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