自動車エネルギー吸収材の一考察

抄録

Current vehicle energy absorbers have two defects during collision, such as failing to achieve an ideal collapse (only 70 % collapsed in its length) and high initial peak load. It is because present energy absorbed column is the most primitive from the point of Origami structure. We developed the column so called Reversed Spiral Origami Structure; RSC which solves these 2 defects from Origami engineering. However, for RSC, the manufacturing cost of hydroforming in the existing technology is too high to be applied in real vehicle structure. To address the problems, a new structure, named Reversed Torsion Origami Structure (RTO), has been developed, which can be manufactured at a low cost by using simple torsion of Origami engineering. This structure is possible to replace conventional energy absorbers and expected to be widely used in building structures.