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MM: Fachverband Metall- und Materialphysik
MM 15: Mechanical Properties III
MM 15.2: Talk
Monday, March 26, 2012, 16:00–16:15, H 0106
Modeling of anisotropic elasto-plastic material behavior with the phase-field method — •Daniel Schneider1, Jan Höhn2, Michael Selzer1,2, Alexander Vondrous2, and Britta Nestler1,2 — 1Institute for Applied Materials - Reliability of Components and Systems, Karlsruhe Institute of Technology — 2Institute of Materials and Processes, Karlsruhe University of Applied Science
An extended phase-field model is formulated incorporating a formulation for elastic and anisotropic plastic effects ones on the evolution of microstructures. Thereby, the displacement field is computed by solving the local momentum balance dynamically. In order to calculate the plastic strain, a plasticity model is implemented consisting of an associated flow rule in combination with an anisotropic yield criterion and a linear hardening approximation.
Simulations with simple loads are performed illustrating the dynamic evolution of the stress and plastic strain in both, single phase systems as well as polycrystalline structures. Further, we present simulations of micro crack propagation induced by external forces with and without plastic deformations.