Simulation analysis of high-speed impact forming of stainless steel bipolar plate
To investigate the deformation condition and forming laws of stainless steel bipolar plate with uneven high impact velocity,combined with the sheet metal velocity field distribution of foil vaporized forming,LS-DYNA was used to establish the finite element simu-lation model of high-speed impact forming of stainless steel bipolar plate,and the dynamic deformation process of stainless steel bipolar plate under the forming process was analyzed.The influence of uneven impact velocity on the forming quality of bipolar plate channel was studied.The results show that the minimum initial impact velocity of stainless steel bipolar plate for impact forming is 350 m·s-1,the thinning rate at the channel ridge is the largest,the thinning rate of remaining parts is less than 30％.With the increase of intial impact velocity,the bipolar plate forming depth is stable above 0.78 mm,and the filling rate is stable at 95％.However,limited by the uneven of velocity field,the effective area of single forming is limited,and the simulation results show that multi-pass forming can form multi-channel stainless steel bipolar plate with good consistency.Finally,the simulation results were validated through multiple passes of foil gasification impact forming experiments.
万方数据
维普
