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Computational homogenization of uncoupled consolidation in micro-heterogeneous porous media

Fredrik Larsson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Kenneth Runesson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Fang Su (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
International Journal for Numerical and Analytical Methods in Geomechanics (0363-9061). Vol. 34 (2010), 14, p. 1431-1458.
[Artikel, refereegranskad vetenskaplig]

Variationally consistent homogenization is exploited for the analysis of transient uncoupled consolidation in micro-heterogeneous porous solids, whereby the classical approach of first-order homogenization for stationary problems is extended to transient problems. Homogenization is then carried out 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 FE2-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 'substructure length scale' that is represented by the size of the RVE's.

Nyckelord: computational homogenization, uncoupled consolidation, FE2, scales



Denna post skapades 2010-10-26. Senast ändrad 2015-06-12.
CPL Pubid: 128118

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik (2005-2017)

Ämnesområden

Teknisk mekanik

Chalmers infrastruktur