Název:	Homogenization of large deforming fluid-saturated porous structures
Autoři:	Lukeš, Vladimír Rohan, Eduard
Citace zdrojového dokumentu:	LUKEŠ, V. ROHAN, E. Homogenization of large deforming fluid-saturated porous structures. COMPUTERS & MATHEMATICS WITH APPLICATIONS, 2022, roč. 110, č. 15 March 2022, s. 40-63. ISSN: 0898-1221
Datum vydání:	2022
Nakladatel:	Elsevier
Typ dokumentu:	článek article
URI:	2-s2.0-85124237442 http://hdl.handle.net/11025/49402
ISSN:	0898-1221
Klíčová slova v dalším jazyce:	Biot model;Multiscale modeling;Porous media;Tissue perfusion;Two-scale homogenization;Updated Lagrangian formulation
Abstrakt v dalším jazyce:	The two-scale computational homogenization method is proposed for modeling of locally periodic fluid-saturated media subjected to a large deformation induced by quasistatic loading. The periodic heterogeneities are relevant to the mesoscopic scale at which a double porous medium constituted by a hyperelastic skeleton and an incompressible viscous fluid is featured by large contrasts in the permeability. Within the Eulerian framework related to the current deformed configuration, the two-scale homogenization approach is applied to a linearized model discretized in time, being associated with an incremental formulation. For this, the equilibrium equation and the mass conservation expressed in the spatial configuration are differentiated using the material derivative with respect to a convection velocity field. The homogenization procedure of the linearized equations provides effective (homogenized) material properties which are computed to constitute the incremental macroscopic problem. The coupled algorithm for the multiscale problem is implemented using the finite element method. Illustrative 2D numerical simulations of a poroelastic medium are presented including a simple validation test.
Práva:	Plný text není přístupný. © Elsevier
Vyskytuje se v kolekcích:	Články / Articles (NTIS) OBD

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