Comparison of different quasi-static loading conditions of additively manufactured composite hexagonal and auxetic cellular structures

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dc.contributor.authorZhou, Jin
dc.contributor.authorLiu, Haibao
dc.contributor.authorDear, John P.
dc.contributor.authorFalzon, Brian G.
dc.contributor.authorKazancı, Zafer
dc.date.accessioned2023-01-26T15:57:32Z
dc.date.available2023-01-26T15:57:32Z
dc.date.issued2022-12-27
dc.description.abstractAuxetic cellular structures have the potential to revolutionise sandwich panel cores due to their potential superior energy absorption capability. Because of their negative Poisson's ratio, auxetics behave counterintuitively and contract orthogonally under an applied compressive force, resulting in a densification of material in the vicinity of the applied load. This study investigates three cellular structures and compares their compressive energy absorbing characteristics under in-plane and axial loading conditions. Three unit cell topologies are considered; a conventional hexagonal, re-entrant and double arrowhead auxetic structures. The samples were additively manufactured using two different materials, a conventional Nylon and a carbon fibre reinforced composite alternative (Onyx). Finite element simulations are experimentally validated under out of and in-plane loading conditions and the double arrowhead (auxetic) structure is shown to exhibit comparatively superior energy absorption. For the carbon fibre reinforced material, Onyx, the specific energy absorbed by the double arrowhead geometry was 125% and 244% greater than the hexagonal (non-auxetic) and re-entrant (auxetic) structures respectively.en_UK
dc.identifier.citationZhou J, Liu H, Dear JP, et al., (2023) Comparison of different quasi-static loading conditions of additively manufactured composite hexagonal and auxetic cellular structures. International Journal of Mechanical Sciences, Volume 244, April 2023, Article number 108054en_UK
dc.identifier.issn0020-7403
dc.identifier.urihttps://doi.org/10.1016/j.ijmecsci.2022.108054
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19040
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectAuxeticen_UK
dc.subjectCellular structuresen_UK
dc.subjectAdditive manufacturingen_UK
dc.subject3D printingen_UK
dc.subjectEnergy absorptionen_UK
dc.subjectCompositeen_UK
dc.titleComparison of different quasi-static loading conditions of additively manufactured composite hexagonal and auxetic cellular structuresen_UK
dc.typeArticleen_UK

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