Sheet Forming and Yield Surface Simulation with Microstructure, Texture and Damage using DAMASK

Keynote Lecture on Advanced Sheet Forming and Yield Surface Simulations under Consideration of Microstructure, Texture and Damage using DAMASK together with co-authors: D. Raabe1), M. Diehl1) 2), K. Sedighiani1) 3), S. Vakili1), P. Shanthraj4), J. R. Mianroodi1), F. Roters1) 1) Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany 2) KU Leuven, Leuven, Belgium 3) Dept. Materials Science and Engineering, Delft University of Technology, Delft, The Netherlands 4) The Department of Materials, The University of Manchester, Manchester M1 3BB, UK The lecture presents a unified multi-physics chemo-mechanical crystal plasticity theory and modeling package and applications to engineering alloys subjected to thermal, chemical and mechanical loads. The solution of continuum mechanical boundary value problems requires constitutive laws that are based on material physics (considering effects such as microstructure, texture, chemistry, hydrogen attack and damage) and that connect deformation and stress at each material point. This task has been implemented in the free software package DAMASK on the basis of the crystal plasticity method using a variety of constitutive laws and homogenization approaches. It is shown that a purely mechanics-based approach is no longer sufficient to study current advanced metallic materials. In these materials the elasto-plastic deformation via shear carriers such as dislocations, TRIP and TWIP effects is strongly coupled to phase transformation, dissipative sample heating, and damage evolution. Therefore, our theory has recently been extended to treat such chemo-mechanical multi-physics and multi-field phenomena. References Roters et al. Computational Materials Science, Vol. 158, 2019, Pages 420 Roters et al. Acta Materialia, Vol. 58, 2010, Pages 1152 https://damask.mpie.de