Cohesive element formulation for z-pin delamination bridging in fibre reinforced laminates

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dc.contributor.authorMohamed, Galal
dc.contributor.authorAllegri, Giuliano
dc.contributor.authorYasaee, Mehdi
dc.contributor.authorHallett, Stephen R.
dc.date.accessioned2018-03-02T10:23:49Z
dc.date.available2018-03-02T10:23:49Z
dc.date.issued2017-03-26
dc.description.abstractZ-pins are an effective method of reinforcing laminated composite materials for resisting the propagation of delamination. In this paper, a novel numerical method combines the classical cohesive finite element (FE) method with a semi-analytical z-pin crack bridging model. Special purpose cohesive elements, in which the generalized traction-displacement characteristics are provided by the semi-analytical model z-pin bridging map, are implemented in macro-scale FE models. This cohesive element offers the flexibility to employ two cohesive laws concurrently for prediction of delamination propagation, for both the pinned and unpinned behaviour. Its efficacy is evaluated by the simulation of double cantilever beam (DCB), mixed-mode bend (MMB), and pure mode II End-Loaded Split (ELS) fracture tests at 2% z-pin areal density. The numerical results in terms of load-deflection predictions agree well with experiments. The different simulations were all performed using a single set of input parameters derived from single z-pin tests with no fitting factors.en_UK
dc.identifier.citationMohamed G, Allegri G, Yasaee M, Hallett SR, Cohesive element formulation for z-pin delamination bridging in fibre reinforced laminates, International Journal of Solids and Structures, Vol. 132-133, February 2018, pp. 232-244en_UK
dc.identifier.cris19664577
dc.identifier.issn0020-7683
dc.identifier.urihttp://dx.doi.org/10.1016/j.ijsolstr.2017.05.037
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13046
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.subjectComposite materialsen_UK
dc.subjectFibre reinforceden_UK
dc.subjectDelaminationen_UK
dc.subjectToughnessen_UK
dc.titleCohesive element formulation for z-pin delamination bridging in fibre reinforced laminatesen_UK
dc.typeArticleen_UK

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