Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 38: Mechanical Properties III

MM 38.6: Vortrag

Mittwoch, 24. März 2010, 17:45–18:00, H16

Performance optimized phase-field simulations of grain structures under the effect of mechanical forces — •Alexander Vondrous, Michael Selzer, Britta Nestler, and Marcus Jainta — Karlsruhe University of Applied Sciences, Moltkestr. 30, 76133 Karlsruhe

An extension of the phase-field model for polycrystalline materials is presented that incorporates the effect of mechanical forces (elasticity and plasticity) on the microstructure. We derive the set of dynamical equations and show simulations of micro cracks in grain structures under the influence of elastic stresses. Isotropic, linear elastic energies according to Hooke's law are applied in the bulk phase regions to account for the stress distribution. A new approach to describe small plastic deformations in the context of the phase-field method is based on ideal plasticity models by Tresca and von Mises criterions. We compute the wave equation of the displacement vector on a staggered grid. Modern parallel and adaptive techniques improve the performance of the numerical algorithms and allow to efficiently employ high performance clusters. As a long range objective, we aim to develop a simulation environment for microstructure formations during rolling and press hardening processes in manufacturing processes of metals.