Computational mesoscale modeling and homogenization of liquid-phase sintering of particle agglomerates
Artikel i vetenskaplig tidskrift, 2012

Liquid phase sintering of particle agglomerates is simulated as the viscous deformation due to particle-particle contact, whereby the single driving force is the surface tension on the particle/pore interface. Particles are modeled as purely viscous fluids (with no elasticity). Computational homogenization is adopted for the RVE with Dirichlet boundary conditions. A surface motion algorithm was developed that requires complete remeshing of the FE-mesh based on a maximum deformation criterion. Since the particles are intrinsically incompressible, the macroscopic compressibility is determined from shrinking porosity in the substructure. The numerical examples include free sintering of an RVE and a fully coupled FE2-simulation of a specimen with inhomogeneous initial distribution of porosity.

Surface Tension

Multiscale

FE2

Sintering

Författare

Mikael Öhman

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Kenneth Runesson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Technische Mechanik

0232-3869 (ISSN)

Vol. 32 463-483

Ämneskategorier

Teknisk mekanik

Mer information

Skapat

2017-10-08