Compressive response of a 3D non-woven carbon- fibre composite

De Montfort University Open Research Archive

Show simple item record Das, S. en Kandan, K. en Kazemahvazi, S. en Wadley, H. N. G. en Deshpande, V. S. en 2017-12-12T14:58:34Z 2017-12-12T14:58:34Z 2017-12-09
dc.identifier.citation Das, S. et al. (2017) Compressive response of a 3D non-woven carbon-fibre composite. International Journal of Solids and Structures en
dc.identifier.issn 0020-7683
dc.description The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link. en
dc.description.abstract The compressive response of a three-dimensional (3D) non-interlaced composite comprising three orthogonal sets of carbon fibre tows within an epoxy matrix is analysed. First, the compressive response is measured in three orthogonal directions and the deformation/failure modes analysed by a combination of X-ray tomography and optical microscopy. In contrast to traditional unidirectional and two-dimensional (2D) composites, stable and multiple kinks (some of which zig-zag) form in the tows that are aligned with the compression direction. This results in an overall composite compressive ductility of about 10% for compression in the low fibre volume fraction direction. While the stress for the formation of the first kink is well predicted by a usual micro-buckling analysis, the composite displays a subsequent hardening response associated with formation of multiple kinks. Finite element (FE) calculations are also reported to analyse the compressive response with the individual tows modelled as anisotropic continua via a Hill plasticity model. The FE calculations are in good agreement with the measurements including prediction of multiple kinks that reflect from the surfaces of the tows. The FE calculations demonstrate that the three-dimensionality of the microstructure constrains the kinks and this results in the stable compressive response. In fact, the hardening and peak strength of these composites is not set by the tows in direction of compression, but rather set by the out-of-plane compressive response of the tows perpendicular to the compression direction. en
dc.language.iso en en
dc.publisher Elsevier en
dc.subject Microbuckling en
dc.subject CFRP en
dc.subject Ductility en
dc.subject Anisotropic plasticity en
dc.title Compressive response of a 3D non-woven carbon- fibre composite en
dc.type Article en
dc.peerreviewed Yes en
dc.explorer.multimedia No en
dc.funder The authors are grateful to the Office of Naval Research (ONR) for their financial support through grant number N62909-16-1-2127 on Dynamic performance of 3D assembled composite structures (program managers Dr Joong Kim & Dr Judah Goldwasser). en
dc.projectid NA en
dc.cclicence CC-BY-NC en 2017-12-08 en

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