Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 31: Postersitzung II
MM 31.52: Poster
Mittwoch, 16. März 2011, 17:15–18:45, P5
Dynamics of small strain plasticity within the framework of a phase-field model — •Jan Höhn1, Daniel Schneider1, Alexander Vondrous2, and Britta Nestler1,2 — 1Institute for Reliability of Components and Systems, Karlsruhe Institute of Technology — 2Institute of Materials and Processes, Karlsruhe University of Applied Science
A small strain plasticity model, based on the principles of continuum mechanics, was incorporated into a phase-field model for polycrystalline material systems in order to investigate the influence of plastic deformation on the change of the free energy. As a first approach, the Prandtl-Reuss model was implemented consisting of an associated flow rule in combination with the von Mises yield criterion and a linear isotropic hardening approximation. The fundamental set of equations is derived from an energy density functional and the numerical solution method is described. Simulations with simple loads on microstructures were performed illustrating the dynamic evolution of the stress and plastic strain by solving the momentum balance and by using a radial return mapping algorithm, respectively. An outlook on the long-term objectives of the new phase-field model is given ranging from applications to crack propagation, recrystallisation and annealing processes.