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Effective Ageing Viscoelastic Behaviour of Solidifying Materials: Estimations from Homogenization of Random Media
The correspondence principle is widely used to estimate the effective behaviour of non-ageing linear viscoelastic composites, as it allows to take advantage of homogenization approaches originally developed in the elastic framework. However, this principle is no longer valid when the phases exhibit ageing. The approach proposed in this paper overcomes this limitation. It allows the use of homogenization of random media on composites made up of isotropic ageing linear viscoelastic phases. It can be applied to estimate the effective viscoelastic behaviour of solidifying composite materials, that is porous materials subjected to gradual precipitation of solids into pore space. This theory developed by Bažant shows that even if the behaviour of the precipitated material is non ageing, the effective behaviour exhibits ageing due to the microstructure evolution with time. Modelling the solidifying material as a set of fictitious ageing linear viscoelastic phases, it is possible to investigate other precipitation mechanisms than the parallel arrangement initially considered by the solidification theory.
Effective Ageing Viscoelastic Behaviour of Solidifying Materials: Estimations from Homogenization of Random Media
The correspondence principle is widely used to estimate the effective behaviour of non-ageing linear viscoelastic composites, as it allows to take advantage of homogenization approaches originally developed in the elastic framework. However, this principle is no longer valid when the phases exhibit ageing. The approach proposed in this paper overcomes this limitation. It allows the use of homogenization of random media on composites made up of isotropic ageing linear viscoelastic phases. It can be applied to estimate the effective viscoelastic behaviour of solidifying composite materials, that is porous materials subjected to gradual precipitation of solids into pore space. This theory developed by Bažant shows that even if the behaviour of the precipitated material is non ageing, the effective behaviour exhibits ageing due to the microstructure evolution with time. Modelling the solidifying material as a set of fictitious ageing linear viscoelastic phases, it is possible to investigate other precipitation mechanisms than the parallel arrangement initially considered by the solidification theory.
Effective Ageing Viscoelastic Behaviour of Solidifying Materials: Estimations from Homogenization of Random Media
Sanahuja, J. (Autor:in)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 1715-1724
18.06.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
A homogenization approach for effective viscoelastic properties of porous media
| British Library Online Contents | 2016
On Ageing Viscoelastic Materials
| NTIS | 1965
| British Library Online Contents | 2015