異なる角度で配置された立方体単位格子を有するラティス構造体の衝撃吸収特性の検討

抄録

Shock absorbing members such as crash boxes are mounted on the front and rear of an automobile to absorb the shock in the traffic accident. This shock absorbing member is required to have a large amount of energy absorption while suppressing the peak load at the initial stage of collision, and to suppress the load fluctuation during crushing. In this study, impact crushing analysis is performed using the finite element analysis software LS-DYNA® for a lattice structure having cubic unit cells positioned at different angles, and investigated the arrangement angle of unit cells that can have a large amount of energy absorption in both frontal collision and oblique collision. As a result, it was found that the lattice structure is suitable for the shock absorbing member of an automobile because the initial peak load is suppressed, and the load fluctuation is suppressed at any collision angle by changing the arrangement angle of unit cells.