Effect of carbon nanofibre addition on the mechanical properties of different Vf carbon-epoxy composites

I, Srikanth and Kumar, Suresh and Singh, V and B, Rangababu and Ghosal, P and Ch, Subrahmanyam (2015) Effect of carbon nanofibre addition on the mechanical properties of different Vf carbon-epoxy composites. Bulletin of Materials Science, 38 (2). pp. 309-317. ISSN 0250-4707

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Abstract

Carbon-epoxy (C-epoxy) laminated composites having different fibre volume fractions (40, 50, 60 and 70) were fabricated with and without the addition of aminofunctionalized carbon nanofibres (A-CNF). Flexural strength, interlaminar shear strength (ILSS) and tensile strength of the composite laminates were determined. It was observed that, the ability of A-CNF to enhance the mechanical properties of C-epoxy diminished significantly as the fibre volume fraction (Vf) of the C-epoxy increased from 40 to 60. At 70Vf, the mechanical properties of the ACNF reinforced C-epoxy were found to be lower compared to the C-epoxy composite made without the addition of A-CNF. In this paper suitable mechanisms for the observed trends are proposed on the basis of the fracture modes of the composite.

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