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Finite strain thermo-mechanical model of filled elastomers at different temperatures

type de publication      communication internationale avec actes publiés
date de publication 2014
auteur(s) Ovalle Rodas Cristian Manuel; Zaïri Fahmi; Naït Abdelaziz Moussa
conférence RubberCon 2014: Advanced Engineering & Materials Developments
     dates de 14-05-2014 à 15-05-2014
     lieu Manchester, UK
     nom des actes Proceedings of the International Rubber Conference 2014
résumé Rubbers are known to exhibit self-heating under cyclic loading. This increase in temperature has a dramatic effect on the stress-strain behaviour of the rubber compound. In this work, a physically consistent model is developed to describe the mechanical response of filled rubbers over a wide range of temperatures. The non-linear large strain mechanical behaviour is described via a Langevin formalism. The filler effect is included by the amplification of the first strain invariant. The temperature effect is included by a thermally evolving chain density function. Experimental data of a styrene-butadiene rubber with fixed carbon-black content have been obtained at different temperatures. In addition, micromechanical models using two-dimensional finite element simulations were constructed considering different arrangements of the microstructure. A comparison between analytical results and experimental-numerical data shows that the proposed constitutive model offers a satisfactory way to predict the material stress-strain response at different temperatures.
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