An approximate multiscale model for aging viscoelastic materials exhibiting time-dependent Poisson's ratio

Abstract : A multi-scale homogenization scheme is proposed to estimate the time-dependent strains of fiber-reinforced concrete. This material is modeled as an aging linear viscoelastic composite material featuring ellipsoidal inclusions embedded in a viscoelastic cementitious matrix characterized by a time-dependent Poisson's ratio. To this end, the homogenization scheme proposed in Lavergne et al. [1] is adapted to the case of a time-dependent Poisson's ratio and it is successfully validated on a non-aging material computed in the Fourier domain. Finally, the new extended estimates of the time-dependent strains of fiber-reinforced concrete are compared to the experimental measurements of Chern and Young [2] and the effects of the volume fraction and aspect ratio of the steel fibers on the time-dependent strains of fiber-reinforced concrete are investigated.
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Cement and Concrete Research, Elsevier, 2016, 86, pp.42-54. 〈10.1016/j.cemconres.2016.04.015〉
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Dernière modification le : mardi 6 mars 2018 - 15:58:36

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F. Lavergne, Karam Sab, J. Sanahuja, Michel Bornert, C. Toulemonde. An approximate multiscale model for aging viscoelastic materials exhibiting time-dependent Poisson's ratio. Cement and Concrete Research, Elsevier, 2016, 86, pp.42-54. 〈10.1016/j.cemconres.2016.04.015〉. 〈hal-01286232〉

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