Computational homogenization of coupled consolidation problems in micro-heterogeneous porous media

Artikel i vetenskaplig tidskrift, 2011

Computational homogenization is exploited for the analysis of transient hydro-mechanically coupled problems subjected to quasistatic loading (consolidation) in micro-heterogeneous porous solids. The classical approach of first-order homogenization is adopted in the spatial domain on representative volume elements (RVE), which are introduced in quadrature points in standard fashion. Along with the classical averages, a higher order conservation quantity is obtained. An iterative FE 2-algorithm is devised for the case of nonlinear permeability and storage coefficients, and it is applied to pore pressure changes in asphalt-concrete (particle composite). Various parametric studies are carried out, in particular with respect to the influence of the characteristics (size, particle arrangement) of the RVE's.