An approximate multiscale model for aging viscoelastic materials exhibiting time-dependent Poisson's ratio. (August 2016)

• Record Type: Journal Article
• Authors: Lavergne, F.; Sab, K.; Sanahuja, J.; Bornert, M.; Toulemonde, C.
• Is Part Of: Cement and concrete research. Volume 86(2016)
• Page Start: 42
• Page End: 54
• Publication Date: 2016-08
• Subjects: Aging -- Creep -- Homogenization -- Ellipsoid; Cement -- Periodicals; Cement -- Research -- Periodicals; Concrete -- Periodicals; Concrete -- Research -- Periodicals; Ciment -- Périodiques; Béton -- Périodiques; Cement; Concrete; Periodicals; 620.135
• DOI: 10.1016/j.cemconres.2016.04.015
• Languages: English
• ISSNs: 0008-8846

Abstract

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.