Filler effects on the thermomechanical response of stretched rubbers |
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Authors: | J.R. Samaca Martinez J.-B. Le Cam X. Balandraud E. Toussaint J. Caillard |
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Affiliation: | 1. Clermont Université, Université Blaise Pascal, Institut Pascal, BP 10448, 63000 Clermont-Ferrand, France;2. CNRS, UMR 6602, Institut Pascal, 63171 Aubière, France;3. Michelin, CERL Ladoux, 63040 Clermont-Ferrand, France;4. Université de Rennes 1, Larmaur ERL CNRS 6274, Campus de Beaulieu, 35042 Rennes, France;5. Clermont Université, Institut Français de Mécanique Avancée, Institut Pascal, BP 10448, 63000 Clermont-Ferrand, France |
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Abstract: | This paper deals with the calorimetric analysis of deformation processes in filled styrene-butadiene rubbers. More especially, the study focuses on the effects of the addition of carbon black fillers on the calorimetric response of “demullinized” SBR. Temperature variations are measured by infrared thermography during cyclic uniaxial tensile tests at ambient temperature. Heat sources1 produced or absorbed by the material due to deformation processes are deduced from temperature fields by using the heat diffusion equation. First, the results show that no mechanical (intrinsic) dissipation is detected for weakly filled SBR, meaning that the heat produced and absorbed over one mechanical cycle is the same whatever the stretch ratio reached. Second, the mechanical dissipation in highly filled SBR is significant. The quantitative analysis carried out highlights the fact that it increases quasi-linearly with the stretch ratio. Finally, a simplified framework is proposed to discuss the identification of the heat sources, in particular the mechanical dissipation. |
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Keywords: | Styrene–Butadiene rubber Infrared thermography Quantitative calorimetry Thermomechanical couplings Mechanical dissipation |
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