Coupled effect of thickness optimization and plastic forming history on crashworthiness performance of thin-walled square tube

Thin-walled tubes are widely used as energy absorbers due to their high crashworthiness performance. This study aims evaluate the effect of plastic forming history carried out for thickness optimization on performance thin-walled square tube (TWST). Within scope study, a series numerical analyzes were conducted TWST using commercial finite element (FE) software. In order determine individual optimization, FG was first obtained LS-OPT Later, gradient achieved by performing rolling process consider effects. Afterwards, deep drawing shape considering springback and trimming Finally, crash responses under axial high-velocity impact loading coupled TWST. It determined that effect, which takes effects into account, reduced peak crush force 24% increased absorbed value 39%. The results from this showed processes has significant TWST, otherwise, either overestimated or underestimated obtained.