Naslov
On Boundary Conditions in Multiscale Second-Order Computational Homogenization Scheme

Autori
Lesičar, Tomislav ; Tonković, Zdenko ; Sorić, Jurica

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 3rd South-East European Conference on Computational Mechanics / - Kos, 2013

Skup
South-East European Conference on Computational Mechanics (3 ; 2013)

Mjesto i datum
Kos, Grčka, 12.06.2013. - 14.06.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
multiscale; computational homogenization; RVE

Sažetak
The present study deals with a second-order two-scale computational homogenization procedure for modeling deformation responses of heterogeneous materials at small strains. The macro to micro transition and the application of generalized periodic boundary conditions on the representative volume element (RVE) at the microlevel are investigated. The structure at macroscale level is discretized by the C1 two dimensional triangular finite elements, while the C0 quadrilateral finite element is used for the discretization of the RVE. The finite element formulations and the new proposed multiscale scheme have been implemented into the finite element software ABAQUS using user subroutines derived. Due to the C1-C0 continuity transition, an additional integral condition on microlevel fluctuation field has to be imposed, as expected.. The integration has been performed using various numerical integration techniques and the results obtained are compared in a few examples. It is concluded that only trapezoidal rule gives a physically based deformed shape of the RVE. Finally, the efficiency and accuracy of the proposed multiscale homogenization approach are demonstrated by the modeling of a shear layer problem, usually used as a benchmark in multiscale analyses.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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