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

The indentation response of a 3D noninterlaced 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 align...

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Bibliographic Details
Published in:Journal of materials research 2018-02, Vol.33 (3), p.317-329
Main Authors: Das, Satyajit, Kandan, Karthikeyan, Kazemahvazi, Sohrab, Wadley, Haydn N.G., Deshpande, Vikram S.
Format: Article
Language:English
Subjects:
Aircraft
Applied and Technical Physics
Biomaterials
Carbon fiber reinforced plastics
Carbon fibers
Carbon-epoxy composites
Composite materials
Deformation
Ductile-brittle transition
Fiber composites
Finite element method
Impact loads
Impact tests
Indentation
Inorganic Chemistry
Invited Article
Invited Articles
Materials Engineering
Materials research
Materials Science
Mathematical models
Nanotechnology
Polyethylene
Polymer matrix composites
Polymers
Shearing
Three dimensional composites
Tomography
Velocity
Yarn
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Summary:The indentation response of a 3D noninterlaced 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 modeled 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 modeled tows with excellent fidelity but under-predict the indentation strength in the other directions. In contrast to anisotropic and brittle laminated composites, 3D noninterlaced composites have a near isotropic and ductile indentation response making them strong candidates for application as materials to resist impact loading.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2017.481