|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Young’s Modulus under Non-proportional Load Paths
||Simon Josef Vitzthum, Wolfram Volk
|On-Site Speaker (Planned)
||Simon Josef Vitzthum
The springback of metal forming parts is a big challenge in production engineering. Hence, further research is necessary to characterize the elasticity of materials more precisely. Former studies show that the Young’s modulus is strain dependent and decreases with increasing plastic strain. In multistage forming processes, a change of the load direction regarding the rolling direction of the sheet metal is common. Within this paper, the influence of non-proportional load paths on the strain dependent elastic behavior of sheet metals is shown. Therefore, a mild steel material is uniaxially pre-stretched with a special tool setup and tensile test specimens are cut out in 0° and 90° to the pre-stretching. These specimens are scrutinized in a subsequent cyclic tensile test. For a reproducible determination of the Young’s modulus, a temperature-dependent method is used, for which the specimens’ surface temperature is measured with a sensor during the tensile tests.
||Definite: At-meeting proceedings