Characterization of a New Fully Recycled Carbon Fiber Reinforced Composite Subjected to High Strain Rate Tension
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Characterization of a New Fully Recycled Carbon Fiber Reinforced Composite Subjected to High Strain Rate Tension H. Meftah 1,2 & S. Tamboura 1 & J. Fitoussi 2 & H. BenDaly 1 & A. Tcharkhtchi 2
Received: 6 July 2017 / Accepted: 24 July 2017 # Springer Science+Business Media B.V. 2017
Abstract The aim of this study is the complete physicochemical characterization and strain rate effect multi-scale analysis of a new fully recycled carbon fiber reinforced composites for automotive crash application. Two composites made of 20% wt short recycled carbon fibers (CF) are obtained by injection molding. The morphology and the degree of dispersion of CF in the matrixes were examined using a new ultrasonic method and SEM. High strain tensile behavior up to 100 s-1 is investigated. In order to avoid perturbation due to inertial effect and wave propagation, the specimen geometry was optimized. The elastic properties appear to be insensitive to the strain rate. However, a high strain rate effect on the local visco-plasticity of the matrix and fiber/matrix interface viscodamageable behavior is emphasized. The predominant damage mechanisms evolve from generalized matrix local ductility at low strain rate regime to fiber/matrix interface debonding and fibers pull-out at high strain rate regime.
* H. Meftah [email protected] S. Tamboura [email protected] J. Fitoussi [email protected] H. BenDaly [email protected] A. Tcharkhtchi [email protected]
1
LMS, ENISo, Université de Sousse, BP264 Cité Erriadh, 4023 Sousse, Tunisie
2
Laboratoire PIMM, UMR 8006 CNRS, Arts et Métiers ParisTech, 75013 Paris, France
Appl Compos Mater
Keywords Recycled composite . Carbon fibers . High strain rate . Fiber/matrix bond . Fiber pull out
1 Introduction Over the last three decades, the use of short fiber reinforced polymer composites in automotive applications has seen an exponential increase. Such composites provide upgraded mechanical properties, enhanced crashworthiness and efficient lightweight solution. As the worldwide volume of composite usage grows, in fact in Europe approximately 1 million tons of composites are manufactured each year [1], the waste coming from manufacturing processes or end-of-life products considerably increases. From the environmental and economic viewpoint, this has raised an awareness of the need to recycle them and turning them into a valuable resource. Due to their complex composition (fibers, matrix and fillers), composites are naturally difficult to recycle entirely. That is the reason why in many cases, only fibers can be recovered during recycling process. Several methods to remove the resin and recover virgin-like fibers from composites waste have been developed [2, 3]. Among them, because of its efficiency, the pyrolysis process is the most widespread used technic. The latter consists in heating the composite to recycle up to 450 °C to 700 °C in the nearly absence of oxygen to volatilize the matrix [2] and then recover the remaining fibers. From cost and mechanical prope
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