Abstract
This paper described the results of the impact energy absorption characteristics of the Al cellular structure using finite element analysis (FEA) and an experiment. Cellular structure has various features such as low density and low thermal conductivity, and it can be changed from low rigidity to high rigidity. We focused on the energy absorption characteristics of woods and proposed the Al cellular structure that was composed of cells with a hole in one direction. We investigated the effect of cell arrangement on impact energy absorption. The cellular structure with a hole arranged in vertical direction enhances the load in the initial stage of collision, and when it was arranged near both side surfaces of the structure, the strength and energy absorption were improved. The model in which the hole size in the cell gradually decreased lowered the initial load and increased the amount of energy absorption per unit mass.
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