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Study of thermosensitive heterogeneous media via space-time homogenization

Abstract : In this paper is presented a theoretical study on the coupled thermosensitive behaviour of heterogeneous, biphasic materials subjected to harmonic excitations of long duration (fatigue tests for example), by a double homogenisation approach -- with respect to both space and time. Applied to the thermal problem, this results in the differentiation of several qualitatively different evolutions in the temperature field. For the mechanical aspect, heat generated by mechanical work leads to temperature rises, which in turn reduce the material moduli, resulting in a bilateral coupling. It is shown that this effect is significant in the case of bituminous concrete. The evolution of the material properties takes place, however, generally on a much longer time-scale than the period of excitation. A double homogenisation approach then results in an entirely macroscopic description.
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  • HAL Id : hal-00940503, version 1

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Claude Boutin, Henri Wong. Study of thermosensitive heterogeneous media via space-time homogenization. European Journal of Mechanics - A/Solids, Elsevier, 1998, 17 (6), pp.939-968. ⟨hal-00940503⟩

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