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U. Beyer, I. Neubauer, J. Kreyca, E. Kozeschnik:
"Virtual Joining Factory - Integration of microstructure evolution in the manufacturing process chain simulation";
Talk: 18th International ESAFORM Conference on Material Forming, Graz; 2015-04-15 - 2015-04-17; in: "Material Forming ESAFORM 2015", (2015), 1325 - 1330.

Numerical simulation of manufacturing processes in engineering is, so far, limited to the simulation of certain aspects, where the material history and the corresponding change of inherent properties are considered to be unaltered by the process. This relates to factors, such as, existing residual stresses, which can evolve during prior processing and which are often ignored, or the evolution of the material microstructure as a consequence of thermo-mechanical treatment. However, in reality, each production step can potentially change the component microstructure and properties and, thus, determine the conditions for the next step. Consequently, the properties of the final component are a result of overlapping and interacting production processes. In present simulations, the microstructure of the material and its response to plastic deformation (flow curves) are commonly assumed to remain unaffected by the production process itself. This discrepancy affects, to a large extent, the accuracy of the simulation results. Therefore, it is not only essential to combine various simulation techniques across the process chain but also to follow the evolution of the mechanical and thermal material properties based on physical models over the entire production chain. In this presentation, we introduce and discuss a corresponding new approach, where materials properties are simulated throughout the process chain Simulation, in the sense of a virtual joining factory, as depicted on the example of the innovative joining by forming technology