Integration of physically based models into FEM and application in simulation of metal forming processes

• Published in: Modelling and simulation in materials science and engineering 2000-11, Vol.8 (6), p.881-891
• Main Authors: Aretz, H, Luce, R, Wolske, M, Kopp, R, Goerdeler, M, Marx, V, Pomana, G, Gottstein, G
• Format: Article
• Language: English
• ISSN: 0965-0393; 1361-651X
• DOI: 10.1088/0965-0393/8/6/309

To obtain higher accuracy in FEM simulations the incorporation of microstructure evolution models becomes more and more important. From the point of view of metal physics it is well known that effects like recrystallization and deformation texture have a big influence on the material properties, especially the mechanical ones. The present article will give an overview about parts of the research activities in the Collaborative Research Centre (SFB 370) of the Deutsche Forschungsgemeinschaft (DFG). Three different types of microstructure models have been developed at the IMM and were coupled at the IBF to an implicit FEM code. The so-called flow-stress model is based on dislocation density evolution to describe the flow curve of metals, mainly at high temperatures. The Taylor-type model is able to describe deformation texture during metal forming. The third model is a modified cellular automation to predict grain size and microstructure evolution during static recrystallization. The simulation of a rolling trial of the Al-alloy AA3104 including the named three models has been made and the results will be validated with experimental findings.