|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Deformation Mechanism of a Novel Double-sheet Incremental Forming
||Zhidong Chang, Jun Chen
|On-Site Speaker (Planned)
Incremental sheet forming (ISF) is considered as an advanced sheet metal forming process which is flexible for rapidly producing complex parts. In the present work, the formability of sheet material can be substantially improved through a novel double-sheet incremental forming (DSIF) process. For better understanding the deformation mechanism of this new variant of single point incremental forming, the fracture behavior and forming limit of the sheet metal are investigated by experiments and compared with conventional incremental sheet forming process. In addition, an analytical model of stress triaxiality is proposed to evaluate the stress state and forming limit of DSIF based on membrane approach. Experimental results confirm that forming limit and fracture strain of the upper sheet can be improved dramatically in DSIF through improving the stress state and deceasing the stress triaxiality. Detailed analyses of numerical simulation and microstructure conducted by SEM provide insights in the forming mechanism of DSIF.
||Definite: At-meeting proceedings