結晶塑性有限要素法による純チタン板の円筒絞り成形シミュレーション

抄録

In this study, cylindrical cup-drawability of a Grade 2 CP-Ti sheet was investigated by means of experiments and crystal-plasticity finite-element simulations. In the experiments, four ears were observed at 45° from the rolling direction, and the texture at the side wall was significantly different in the circumferential direction due to the difference in twinning activity. In particular, twinning was very active in the transverse direction, while twinning was not active in the rolling direction. The simulation results were in good agreement with the experimental results. Numerical experiments suggested that the twinning activity hardly affected the earing formation, indicating that the earing formation would be governed primarily by slip activities.