Pages 687-688
The purpose of this study is to clarify the cause of difference between analytical reslut and experimental result. Hydro forming analysis was carried out at first. After that, impact crash analysis was carried out. In order to investigate the effect of hydro forming process such as wall thinning, residual stress and residual strain on impact crash analysis, the anslysis considering the manufacturing process was compared with that not considering the manufacturing process. The summary of reslts obtained through the present study is as follows : (1) The plastic strain caused by hydro forming affect on the deform behavior mode and absorbed energy in impact crash analysis. (2) The wall thinning caused by hydro forming doesn't affect on the deform behavior mode and absorbed energy in impact crash analysis. (3) The residual stress before spring back doesn't affect on the deform behavior mode and absorbed energy in impact carsh analysis. (4) The quantity of deference between the anslysis without all effects of hydro forming and that one with all effects of hydro forming depends on n value and total strain.
