Meso- and Macroscopic Modelling, Simulation and Numerical Homogenization of the Behaviour of Metallic Materials in Additive Manufacturing

When metallic powders are used as base materials in selective beam melting processes, the resulting mesostructure of the solidified material, i.e. the geometry (shape, size) of the crystal grains and their orientation (texture) is strongly dependent on the direction and magnitude of the temperature gradient at the solidification front. The objective of this project is the continuum-thermo-mechanical modelling and simulation of the material behaviour, taking into account the process-induced mesostructure. For this purpose, a gradient-enhanced crystal plasticity formulation is used on the mesoscale and the mesoscopic variables are transferred by the use of numerical homogenization to the macroscale, both for the isothermal behaviour after the process as well as for the cooling period during the process, which results in residual strains and accompanying residual stresses.

 

Professor Steinmann
Professor Mergheim
Kergassner""

Prof. Dr.-Ing. habil. Paul Steinmann
Lehrstuhl für Technische Mechanik (LTM)
Friedrich-Alexander-Universität Erlangen-Nürnberg
Paul-Gordan-Straße 3
91052 Erlangen
paul.steinmann@ltm.uni-erlangen.de

Prof. Dr.-Ing. Julia Mergheim
Lehrstuhl für Technische Mechanik (LTM)
Friedrich-Alexander-Universität Erlangen-Nürnberg
Egerlandstr. 5
91058 Erlangen
julia.mergheim@ltm.uni-erlangen.de

Andreas Kergaßner, M.Sc.
Lehrstuhl für Technische Mechanik (LTM)
Friedrich-Alexander-Universität Erlangen-Nürnberg
Egerlandstr. 5
91058 Erlangen
andreas.kergassner@ltm.uni-erlangen.de