This work establishes a fine model reflecting the characteristics of immersed tube structures to study spatial mechanical variable cross section tunnels. Then, behavior pipe segments under differential deformation is explored, based on which we propose formula for estimating shear key force and analyze corresponding failure mechanism mode. Thus, critical points segment design are specified. The...

Abstract Aiming at target steel car bumper new lightweight design, with a vehicle static crushing, three pressure and impact test simulation analysis based on the performance parameters, design targets aluminum alloy box, section size of anticollision beam energy absorption materials they need to determine performance. The three-point method is used optimize anti-collision beam. Because loading...