Indentation response of a 3D non-woven carbon-fibre composite
Journal of Materials Research
Cambridge University Press
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Das, S., Kandan, K., Kazemahvazi, S., Wadley, H., & Deshpande, V. (2018). Indentation response of a 3D non-woven carbon-fibre composite. Journal of Materials Research, 33 (3), 317-329. https://doi.org/10.1557/jmr.2017.481
The indentation response of a 3D non-interlaced composite comprising three sets of orthogonal carbon-fibre tows in an epoxy matrix is investigated. The 3D composites have a near isotropic and ductile indentation response. The deformation mode includes the formation of multiple kinks in the tows aligned with the indentation direction and shearing of the orthogonally oriented tows. Finite element (FE) calculations are also reported wherein tows in one direction are explicitly modelled with the other two sets of orthogonal tows and the matrix pockets treated as an effective homogenous medium. The calculations capture the indentation response in the direction of the explicitly modelled tows with excellent fidelity but under-predict the indentation strength in the other directions. In contrast to anisotropic and brittle laminated composites, 3D non-interlaced composites have a near isotropic and ductile indentation response making them strong candidates for application as materials to resist impact loading.
External DOI: https://doi.org/10.1557/jmr.2017.481
This record's URL: https://www.repository.cam.ac.uk/handle/1810/273468