Micromechanics of transformation fields in ageing linear viscoelastic composites: effects of phase dissolution or precipitation

Abstract : Transformation fields, in an affine formulation characterizing mechanical behavior, describe a variety of physical phenomena regardless their origin. Different composites, notably geomaterials, present a viscoelastic behavior, which is, in some cases of industrial interest, ageing, i.e. it evolves independently with respect to time and loading time. Here, a general formulation of the micromechanics of prestressed or prestrained composites in Ageing Linear Viscoelasticity (ALV) is presented. Emphasis is put on the estimation of effective transformation fields in ALV. The result generalizes Ageing Linear Thermo- and Poro-Viscoelasticity and it can be used in approaches coping with a phase transformation. Additionally, the results are extended to the case of locally transforming materials due to non-coupled dissolution and/or precipitation of a given (elastic or viscoelastic) phase. The estimations of locally transforming composites can be made with respect to different morphologies. As an application, estimations of the coefficient of thermal expansion of a hydrating alite paste are presented.
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https://hal.archives-ouvertes.fr/hal-01896679
Contributor : Tulio Honorio de Faria <>
Submitted on : Tuesday, October 16, 2018 - 12:55:49 PM
Last modification on : Tuesday, August 27, 2019 - 3:14:03 PM

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Túlio Honório. Micromechanics of transformation fields in ageing linear viscoelastic composites: effects of phase dissolution or precipitation. Mechanics of Time-Dependent Materials, Society for Experimental Mechanics, 2017, 21 (4), pp.597 - 612. ⟨10.1007/s11043-017-9344-1⟩. ⟨hal-01896679⟩

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