Papers by Konrad Perzyński
The multiscale modelling of material behaviour during processes of heating and cooling or under l... more The multiscale modelling of material behaviour during processes of heating and cooling or under loading conditions is highly sophisticated numerical problem. It requires many advanced algorithms solving a thermo-mechanical issues in macro scale as well as algorithms simulating undergoing processes of microstructure evolution, e.g. recrystallization, phase transformation or fracture occurring in micro and nano scales. These phenomena are closely coupled and depends on each other. To properly illustrate this behaviour the numerical algorithms have to be also arranged together in various configurations, e.g. simultaneously, sequentially, iteratively or conditionally. This eventually leads to complex numerical solutions. Coupling various micro scale evolution models always presents difficulties and requires a high-level framework responsible for exchange of data through programming interfaces. A static component diagram and reverse engineering is not sufficient to satisfy requirements of such advanced approaches. Therefore, authors decided to apply the dynamic workflow idea into the microstructure evolution simulations. The dynamic workflow supports design of complex algorithm with flexible data flow and reusable components. The computer program implemented on the basis of the Windows Workflow Foundation and results obtained from simulations are presented in the paper.
The summary of recent research towards development of a tool for detailed microstructure modellin... more The summary of recent research towards development of a tool for detailed microstructure modelling is presented within the paper. The main focus is put on micro scale behaviour, where advantages of digital material representation can be taken into account. Digital Material Representation allows modelling of microstructures along with features such as crystallographic orientation, grain boundaries or phase boundaries represented in an explicit manner. Incorporation of these digital microstructures into the numerical simulation methods provides the possibility to improve the quality of numerical results. The developed method can be used to design specifically dedicated microstructures, which meet very strict requirements. The clear motivation and importance of the work is presented in the first part of the paper followed by a short description of the developed approaches for creation of the digital microstructures. Two approaches are considered that provide an exact and statistical representation of the real microstructure. The main focus is put on the application of image processing and cellular automata techniques. Afterwards, obtained digital microstructures are used as input data for the finite element analysis of the micro scale compression test. Examples of applications during multiscale simulation are also presented in the paper.
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Papers by Konrad Perzyński