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Computational mesoscale modeling and homogenization of liquid-phase sintering of particle agglomerates

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)
Technische Mechanik (0232-3869). Vol. 32 (2012), p. 463-483.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: FE2; Multiscale; Sintering; Surface Tension



Denna post skapades 2012-08-13. Senast ändrad 2015-06-12.
CPL Pubid: 161457

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik (2005-2017)

Ämnesområden

Fastkroppsmekanik

Chalmers infrastruktur