|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Experimental Investigation of Strain Hardening Up to Large Deformation by In-plane Torsion Test for 5182 alloy
||Chong Zhang, Yanshan Lou, Till Clausmeyer, A. Erman Tekkaya, Lei Fu, Qi Zhang
|On-Site Speaker (Planned)
In this study, in-plane torsion tests are conducted to study strain hardening of a 5182 aluminum alloy sheet. The strain is analyzed by a digital image correlation (DIC) system in the shear zone to obtain the relationship between the torsion angle of the shear zone center and the equivalent strain value, while a load cell is used to monitor the applied torque during the tests. The torque value is analytically converted into the stress value. The converted stress is finally combined with the strain value measured by DIC method to construct the stress-strain curve in shear loading. The stress-strain curve is obtained by iteratively comparing the simulation and experimental torque-angle curve, which is referred as inverse engineering approach. The strain hardening curves obtained by these two approaches are compared for the evaluation purpose. The comparison indicates that the inverse engineering approach is better than the analytical one to obtain the hardening properties for larger strain up to fracture from the in-plane torsion test. The in-plane torsion test is also numerically simulated with different yield functions. The numerical simulation suggests that the Drucker function better predicts the torque during the torsion tests. It is also worth noting that the Drucker yield function, or a non-quadratic yield function, can also be optimized by the inverse engineering approach to better predict the hardening behavior of the material.
||Definite: At-meeting proceedings