Dresden 2009 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 20: Poster Session I

MM 20.15: Poster

Tuesday, March 24, 2009, 14:45–16:30, P4

3D Polycrystalline grain structures under the influence of elastic forces — Mathias Reichardt, •Marcus Jainta, Michael Selzer, and Britta Nestler — Institute of Computational Engineering, Karlsruhe University of Applied Sciences, Germany

To predict the failure and strength properties of metallic alloys, it is neccessary to take in account the behaviour of such material under the influence of elastic forces. When applying a sufficient amount of stress, the grain structure breaks and forms a crack. In numerical simulations, we investigate crack propagation in polycrystalline metallic alloys for mode I and III. The shape of such cracks depends on the applied loads and on the grain distribution of the observed material. Suitable simulations require many grains in a relatively large domain. To achieve this goal, we present a parallel, optimized multi phase field model featuring efficient modelling of large three dimensional phase systems coupled with a model for elastic stresses. We show results for 2D and 3D crack developments along grain boundaries and in polycrystalline systems.