laboratoire de physique statistique
 
 
laboratoire de physique statistique

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2015
Nonmonotonic fracture behavior of polymer nanocomposites - de Castro, J. G. and Zargar, R. and Habibi, M. and Varol, S. H. and Parekh, S. H. and Hosseinkhani, B. and Adda-Bedia, M. and Bonn, D.
APPLIED PHYSICS LETTERS 106 (2015)

Abstract : Polymer composite materials are widely used for their exceptional mechanical properties, notably their ability to resist large deformations. Here, we examine the failure stress and strain of rubbers reinforced by varying amounts of nano-sized silica particles. We find that small amounts of silica increase the fracture stress and strain, but too much filler makes the material become brittle and consequently fracture happens at small deformations. We thus find that as a function of the amount of filler there is an optimum in the breaking resistance at intermediate filler concentrations. We use a modified Griffith theory to establish a direct relation between the material properties and the fracture behavior that agrees with the experiment. (C) 2015 AIP Publishing LLC.