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Mechanical behavior of a PP platelet-reinforced nanocomposite: experimental characterization and two scale modeling of linear and non linear response

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2010
auteur(s) Cauvin Ludovic; Kondo Djimédo; Brieu Mathias; Bhatnagar Naresh
journal (abréviation) Materials Science and Engineering: A (Mater Sci Eng A)
volume (numéro) 527 (4-5)
pages 1102 – 1108
résumé The present study is devoted to the mechanical behavior of a class of nanocomposites made up of Polypropylene reinforced by Montmorillonite clay nanoplatelets. We first perform uniaxial tensile tests which shown that some mechanical characteristics (Young's modulus, yield stress) of the nanocomposite significantly increase compared to the matrix, even for very low volume fraction (less than 3%). For the elastic regime, it is shown that the Ponte Castãneda and Willis (PCW) bound predicts accurately the impact of nano platelets on the moduli, provided that a suitable choice of the aspect ratio is made. The non linear behaviour of the nanocomposites is investigated by means of Hill-type incremental homogenization method combined with PCW bound. Finally, the model predictions are compared to our experimental data.
mots clés Nanocomposites; Montmorillonite clay; Polypropylene; Mechanical; Properties, Two scale modeling
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