Mechanical Performance of a Recycled Carbon Fibre/PP Composite |
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Authors: | K Giannadakis M Szpieg J Varna |
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Institution: | 1.Polymer Engineering Division,Lule? University of Technology,Lule?,Sweden;2.Swerea SICOMP AB,M?lndal,Sweden |
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Abstract: | A composite made of recycled carbon fibres in recycled polypropylene matrix is studied experimentally to describe the features
of the elastic and time dependent nonlinear mechanical behaviour. The properties of the developed material have a large variability
to be addressed and understood. It was found that the stress-strain curves in tension are rather nonlinear at low strain rate
and the strength is sensitive to strain rate. The elastic properties’ reduction for this composite after loading to high strains
is rather limited. More important is that even in the “elastic region” due to viscoelastic effects the slope of loading–unloading
curve is not the same and that at higher stress large viscoplastic strains develop and creep rupture is typical. The time
and stress dependence of viscoplastic strains was analysed and described theoretically. The viscoelastic response of the composite
was analysed using creep compliance, which was found to be slightly nonlinear. |
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