ラティス構造の衝撃吸収特性評価

抄録

In this study, the relationship between the impact speed and the compressive at failure stress of the micro lattice structure has been studied using the finite element method. Based on the numerical results, the following conclusions have been obtained. Firstly, the stress-strain diagram of the lattice structure is divided into two curves: plastic yielding of the center beam (Stage 1) and the crushing of the beam composed of inclined beams (Stage 2). The maximum load can be attained when the inclined beams yeild. Secondly, the maximum stress of the lattice structure varies with the impact speed, and it depends on the buckling mode.