Development of origami forming to improve the flexibility of truss core panel design

Abstract

Although honeycomb panel is widely used in various structure, its adhesive to glue honeycomb core and plate may burn by fire, leading to the requirement of another lightweight and high stiffness panel. Recently, we have developed truss core panel's structure that has equivalent bending stiffness as honeycomb panel, stronger in shear and safer in a fire than honeycomb panel. However, it is difficult in general to form truss core. Multi-stage press forming process was investigated, but it cannot manufacture high aspect ratio structure because of the limit of press forming process. The main objective of this research is to develop a new process for truss core panel by using bending method, suggesting an ability to manufacture a wider range of structure than before. In this paper, firstly the comparison between two different ways of punch arrangement is discussed. Then we evaluate the effectiveness of a springback reduction method by increasing pressure from the punch to the material.

Keywords

• origami engineering
• truss core panel
• formability
• metal bending
• finite element method