The large strain behaviour of a short fibre-reinforced composite is studied through numerical simulations. The reinforcing fibres yield the macroscopic response transversely isotropic which is indeed the case of many reinforcements currently used in composites: short carbon fibres, cellulose whiskers, carbon nanotubes. As a result of the analysis, it is shown that the reorientation of the fibres that takes place at large strain has a significant effect on the overall material response by changing the axis of isotropy. This behaviour can be adequately described by using a transversely isotropic model whose strain energy function depends on three invariants: two isotropic and one representing the stretch along the direction of the fibres. To assess its capabilities, the model is compared to the results of experiments carried out by the authors on nickel-coated chopped carbon fibres in a vulcanised natural rubber matrix for which the fibre orientation is achieved by controlling an external magnetic field prior to curing. Possible applications include micro-sized propulsion devices and actuators. Copyright © 2014 by ASME.

Orientation effects in short fibre-reinforced elastomers / Ciambella, Jacopo; Stanier, David C.. - 9:(2014). ((Intervento presentato al convegno ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014 tenutosi a Montreal; Canada [10.1115/IMECE2014-40430].

Orientation effects in short fibre-reinforced elastomers

CIAMBELLA, JACOPO;
2014

Abstract

The large strain behaviour of a short fibre-reinforced composite is studied through numerical simulations. The reinforcing fibres yield the macroscopic response transversely isotropic which is indeed the case of many reinforcements currently used in composites: short carbon fibres, cellulose whiskers, carbon nanotubes. As a result of the analysis, it is shown that the reorientation of the fibres that takes place at large strain has a significant effect on the overall material response by changing the axis of isotropy. This behaviour can be adequately described by using a transversely isotropic model whose strain energy function depends on three invariants: two isotropic and one representing the stretch along the direction of the fibres. To assess its capabilities, the model is compared to the results of experiments carried out by the authors on nickel-coated chopped carbon fibres in a vulcanised natural rubber matrix for which the fibre orientation is achieved by controlling an external magnetic field prior to curing. Possible applications include micro-sized propulsion devices and actuators. Copyright © 2014 by ASME.
2014
ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
Mechanical Engineering; Carbon; Elastomers
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Orientation effects in short fibre-reinforced elastomers / Ciambella, Jacopo; Stanier, David C.. - 9:(2014). ((Intervento presentato al convegno ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014 tenutosi a Montreal; Canada [10.1115/IMECE2014-40430].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/844378
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