Effective use of metallic Z-pins for composites' through-thickness reinforcement

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dc.contributor.authorM'membe, Beene
dc.contributor.authorYasaee, Mehdi
dc.contributor.authorHallett, Stephen
dc.contributor.authorPartridge, Ivana K.
dc.date.accessioned2019-04-18T10:40:23Z
dc.date.available2019-04-18T10:40:23Z
dc.date.issued2019-02-28
dc.description.abstractZ-pins offer effective through-thickness reinforcement for laminated composites. Various studies have however, shown that metal Z-pins are less effective at bridging Mode I delaminations than carbon-fibre composite Z-pins, due to poor interfacial bonding with the laminate. This is exacerbated by high thermal mismatch between the metallic Z-pins and the laminate. This study investigates inserting metallic Z-pins at angles offset from the laminate normal, to improve the Mode I bridging in composites. The effects on the apparent fracture toughness under pure and mixed Mode I/II loads using single pin specimens is investigated. Results show that, unlike orthogonally inserted metal Z-pins, inclined Z-pins exhibit high energy absorption throughout the mixed mode range. Double Cantilever Beam (DCB) tests show that the inclined metal Z-pins increase the Mode I apparent fracture toughness by a factor of 2 compared to traditional carbon fibre Z-pins. In End Loaded Split (ELS) tests, the Mode II apparent fracture toughness of inclined stainless steel Z-pins, although less than their uninclined equivalent, is greater than that of carbon fibre Z-pins.en_UK
dc.identifier.citationM'membe B, Yasaee M, Hallett SR, Partridge IK. (2019) Effective use of metallic Z-pins for composites' through-thickness reinforcement. Composites Science and Technology, Volume 175, May 2019, pp. 77-84en_UK
dc.identifier.issn0266-3538
dc.identifier.urihttp://doi.org/10.1016/j.compscitech.2019.02.024
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14097
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectFractures toughnessen_UK
dc.subjectInclined insertionen_UK
dc.subjectMetal Z-pinsen_UK
dc.titleEffective use of metallic Z-pins for composites' through-thickness reinforcementen_UK
dc.typeArticleen_UK

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