Computational homogenization of uncoupled consolidation in micro-heterogeneous porous media
Artikel i vetenskaplig tidskrift, 2010

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.

scales

computational homogenization

uncoupled consolidation

FE2

Författare

Fredrik Larsson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Kenneth Runesson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Fang Su

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

International Journal for Numerical and Analytical Methods in Geomechanics

0363-9061 (ISSN)

Vol. 34 14 1431-1458

Ämneskategorier

Maskinteknik

DOI

10.1002/nag.862

Mer information

Skapat

2017-10-07