STRAIN DISTRIBUTION ANALYSIS BASED ON THE DIGITAL MATERIAL REPRESENTATION

摘要

Results of research on application of modern numerical approaches for analysis of influence of microstructure heterogeneities on strain distribution during material processing are presented in this work. This work is part of the research towards development of the tool for detailed microstructure modeling. The main focus here is put on the micro scale behavior, where advantages of digital material representation can be taken into account. Digital representation allows to model microstructure with its features like crystallographic orientation, grain boundaries or phase boundaries taken in an explicit manner. By combination of these digital structures with numerical simulation methods a possibility to improve quality of results was created. Developed method can be used to design specifically dedicated microstructures, which meet very strict requirements. In the first part of the work the review of various ideas of digital representation of materials is presented. It is followed by a short description of the application of the developed approach to creation of the digital microstructures. The main focus is put on the application of cellular automata technique. Afterwards, obtained digital microstructures of ferrite steel and two phase steels are used as an input data for the finite element analysis of the compression test. Selected results are also presented and discussed in the paper.