CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

On the formulation of a computational homogenization scheme with seamless transition from compressible to incompressible microstructures

Mikael Öhman (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Fredrik Larsson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Kenneth Runesson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
CMM 2013, 20th International Conference on Computer Methods in Mechanics 2013 (2013)
[Konferensbidrag, övrigt]

In this paper, we discuss how the classical Dirichlet and Neumann boundary conditions in computational homogenization are applied to incompressible microstructures. We adopt a macroscale mixed velocity-pressure formulation that seamlessly handles the transition from compressible to incompressible microstructures. As a prototype problem, we consider liquid phase sintering, whereby the microstructure within a Representative Volume Element (RVE) is modeled as incompressible fluid particles with empty pores and with surface tension as the densifying mechanism. A porous ``green body'' thus evolves to a completely dense, and incompressible, microstructure. The example shows a numerical comparison between for a single RVE.

Nyckelord: FE2; Multiscale; Neumann boundary conditions; Stokes' flow; Incompressibility; Surface tension; Sintering



Denna post skapades 2014-01-15. Senast ändrad 2015-06-12.
CPL Pubid: 192556

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik

Ämnesområden

Maskinteknik

Chalmers infrastruktur