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

Third Party Funds Group - Sub project

Overall project details

Overall project: Additive Manufacturing

Overall project speaker:
Prof. Dr.-Ing. Dietmar Drummer (Lehrstuhl für Kunststofftechnik)


Project Details

Project leader:
Prof. Dr.-Ing. Paul Steinmann
PD Dr. Julia Mergheim

Project members:
Andreas Kergaßner

Contributing FAU Organisations:
Lehrstuhl für Technische Mechanik

Funding source: DFG - Sonderforschungsbereiche
Start date: 01/07/2015
End date: 30/06/2019


Research Fields

Multiscale mechanics
Lehrstuhl für Technische Mechanik


Abstract (technical / expert description):


If 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), 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 help 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.



Publications

Kergaßner, A., Mergheim, J., & Steinmann, P. (2018). Modeling of additively manufactured materials using gradient-enhanced crystal plasticity. Computers & Mathematics With Applications. https://dx.doi.org/10.1016/j.camwa.2018.05.016
Kergaßner, A., Mergheim, J., & Steinmann, P. (2016). Mesoscopic modelling of additively manufactured Inconel 718. In Igor Drstvenšek, Dietmar Drummer, Michael Schmidt (Eds.), Proceedings 6th International Conference on Additive Technologies - iCAT2016 (pp. 222-226). Nürnberg: Ljubljana: Interesansa - zavod.
Kergaßner, A., Mergheim, J., & Steinmann, P. (2016). Modelling additive manufactured materials using a crystal plasticity model. Proceedings in Applied Mathematics and Mechanics, 16(1), 355-356. https://dx.doi.org/10.1002/pamm.201610166

Last updated on 2018-06-11 at 17:46