IMPROVEMENT IN THE CONSISTENCY OF ACHIEVING DIAMOND COLLAPSE MODE IN ORIGAMI CRASH BOX USING NATURAL FOLDING LENGTH METHOD

• Main Author: Falyanzhuri Irzanto, Mirshaan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71064
• Institution: Institut Teknologi Bandung

The growth of vehicle usage each year without adequate development in infrastructure causes an increase in traffic accidents. One effort to reduce the impact of accidents is by using a crashbox. However, the usage of crashbox is only effective in relatively low speed crashes, therefore one of the innovations to increase crashbox energy absorption capability is by introducing a folding pattern on crashbox surfaces or referred to as origami crashbox. Origami crashbox has a better performance compared to conventional crashbox, but it has a weakness that is sensitivity to geometry imperfections and lack of consistency in achieving the desired deformation mode, namely diamond collapse mode. Origami crashbox used in this study has a rectangular shape as its base crosssection, and octagonal as mid-cross-section. The crease patterns are given as a transition between two cross-section geometry. In this study, origami crashbox will be tested on axial loading with variations in the number of fold units, while the pattern is folded from metal plates with the same size. In parametric study, the number of folds in origami crashbox is notated as the ratio between the height of one origami unit and natural folding length of a conventional rectangular crashbox of the same size (????/2????).. Besides that, a test on the effect of fold angle on crashbox performance will be conducted as well, with fold angle notated as the ratio between the height of one origami unit and the length of octagonal cross-sectional (????/????), and then the mean crushing force of origami crashbox will be formulated as a function of thickness (????) and fold angle (????/????). In this research, the range of (????/2????) values on origami crashbox that gives the best performance and consistency will be obtained as well.