Deformation Behavior Simulation in Laser Forming of Titanium Sheet -Influence of Free Edge on Deformation Behavior in Laser Forming

摘要

In this research, deformation behavior of titanium sheet in laser forming was simulated. In preliminary experiments, we had carried out single-straight-line bending and investigated the relationship between the bended angle and the laser processing conditions. It was clarified that the bended angle formed by laser forming to the free edge became larger than the angle formed by laser forming to the center, even if laser scanned in same processing conditions. To investigate the influence of the free edge, heat-transfer analysis and structural analysis were carried out by using a finite element analysis software ANSYS 11.0. It was confirmed that the bended at the free edge became large because the plastic strain of the lower surface has decreased greatly more than the strain of the upper surface decreases.