Abstract
In order to develop a new crash energy absorb structure, in this paper, we propose a new reverse torsion type origami structure (RTO) and a partial heating torsion method. The RTO can adjust the distribution of crash buckling wrinkles by arranging polygonal lines along the side surface, and can have the property of stably continuing accordion-type crushing deformation during the crushing process. In the newly proposed partial heating torsion method, the square pipe material is divided into multiple stages along the axial direction, and a formed RTO can be obtained by repeating partial heating and simple torsion forming for each stage. In addition, by applying the method of heating only to the torsional deformed part, it is possible to process with a small processing load, and it is possible to realize the simplification of the jig for fixing the square tube material. This study examines the problems of forming RTO by the partial heating and torsion method and the forming shape quality. We will also examine whether the obtained RTO has sufficient crash energy absorption performance.
