AM によって作成されたセル構造体のセルの大きさが強度に及ぼす影響

抄録

The cell structure is expected as a new internal structure of parts to realize light weight and high strength. However, there are some problems in fabrication with additive manufacturing (AM). In this study, the effect of cell size on strength of cell structure fabricated by AM is evaluated. The body-centered cubic cell (bcc) structure fabricated by AM with ABS resign is chosen as a target cell structure. First, the displacement in compression tests is simulated with Finite Element Method (FEM). Then, using universal testing machine, compression tests are conducted on the cell structure fabricated by AM. The results of compression experiments are compared with the results of FEM simulation, and cell size effects on strength is discussed. It was found that the volume density becomes higher and the strength becomes higher than designed one in case that the cell size is small. However, it was not recognized that the deposition direction has effects on stiffness of cell structures fabricated by AM.