二層円管の成形性におけるパンチ速度の影響

抄録

Recently, earthquakes frequently occur in Japan. It is desired to promote seismic isolation technology of building. It has been found that composite material filled with low rigidity material to high rigidity material has energy absorbing capacity. However, it must have higher energy absorption capacity in order to respond to a large scale earthquake. Therefore, a new energy absorbing device with cells was proposed. Two-layer circular tubes were used as the cells in order to equip energy absorbing capacity themselves. It is known from previous studies that has been found to be a Hysteresis occurs and it absorb the energy by friction that is generated between the outer layer and the inner layer. It is effective when inside shape of inner layer is floral pattern. In this study, we examined forming method of two layer circular tube and investigated effect of punch speed on formability of two-layer circular tube. In addition, the inner shape of the inner circular tube is also considered the case of floral pattern. As a result, fast punch speed is better formability than slow one. In addition, floral pattern is better formability and functionality than round.