Ermittlung von Fließkurven für Blechwerkstoffe im Mikrobereich mittels Aero-Bulgetest unter Berücksichtigung des Skalierungseffektes

随着产品小型化和人性化的发展趋势，传统钣金成形工艺的规模化势在必行。此外，还需要深入了解结垢效应对机械性能的影响，特别是对小型压力机的开发。本项目的目的是通过进行微型化拉伸试验来了解尺度效应。在常规拉伸试验机的基础上，设计一种小型化的拉伸试验装置，以减小试验过程中的振动，提高试验精度。随着试样尺寸的变化，将进行拉伸试验。通过对微型化拉伸试验力学性能的缩尺效应规律的理解，开发出考虑缩尺效应的理想尺寸力学性能计算软件。最后，对简单的杯形拉深工艺进行了从几百毫米到几毫米不等的仿真和实验，并对仿真和实验结果进行了比较，验证了所开发的软件的正确性。

By the trend of manufacturing small and human oriented products, the needs of scaling down of the conventional sheet metal forming process is necessary. Furthermore thorough understanding of scaling effect on the mechanical properties and development of mini-press machine specially are needed, too. The purpose of this project is to unterstand the scale effect by doing miniaturized tensile test. A device for the miniaturized tensile test will be designed and inserted to the conventional tensile test machine in order to get little vibration and increase accuracy during the test. With variable sizes of specimens, tensile tests will be performed. By understanding the rule of scale-down effect using mechanical properties from miniaturized tensile tests, a software which can calculate suitable mechanical properties for the desired size with considering scaling effect will be developed. Finally, simulation and experiment of simple cup drawing process will be carried out varying the sizes of tools from few hundred mm to few mm. Comparing both results from simulation and experiment, the developed software will be verified.