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Multi-scale simulations of rearrangement effects and anisotropic behavior during sintering

: Wonisch, A.; Kraft, T.; Riedel, H.


Vincenzini, P.:
11th International Ceramics Congress, CIMTEC 2006. Proceedings : 11th International Ceramics Congress and 4th Forum on New Materials, Acireale, Sicily, Italy, June 4-9, 2006
Clausthal-Zellerfeld: Trans Tech Publications, 2006 (Advances in science and technology 45)
ISBN: 3-908158-01-X
ISBN: 978-3-908158-01-1
International Ceramics Congress (CIMTEC) <11, 2006, Acireale, Sicily>
Forum on New Materials <4, 2006, Acireale, Sicily>
Fraunhofer IWM ()
sintering; simulation; modeling; rearrangement; anisotropy; discrete element method; finite element method

Numerical modeling of sintering by continuum mechanical simulations is successfully applied today to predict e.g. the distortions developing during sintering. Several examples that demonstrate the possibilities of such simulations especially for industrial applications have been published recently. However, there are sill open questions regarding the influence of grain rearrangement, crack formation and anisotropic starting configuratins (e.g. due to prior compaction). By using the Discrete Element Method the sintering process can be investigated on a more fundamental mesoscopic scale. This method also considers effects due to particle rearrangement or anisotropic configurations as well as crack developments automatically. Their influence on various macroscopic properties like densification rate and viscosities is studied. Suggestions how to use these insights to improve existing continuum mechanical models are given.