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

随着产品小型化、人性化的发展趋势，传统的板料成形工艺有必要进行小型化。此外，还需要深入了解结垢对微型压力机机械性能的影响，特别是开发微型压力机。本课题的目的是通过小型化拉伸试验来了解材料的尺度效应。设计了一种小型化拉伸试验装置，并将其插入到常规拉伸试验机中，使试验过程中振动小，提高了试验精度。对于不同尺寸的试件，将进行拉伸测试。通过从小型化拉伸试验中了解力学性能的缩尺效应规律，将开发一个软件，该软件可以在考虑缩尺效应的情况下计算所需尺寸的合适的力学性能。最后，对模具尺寸从几百mm到几mm的简单杯形件拉深过程进行了模拟和实验。将仿真结果与实验结果进行对比，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.