STUDI PENGGUNAAN AUXETIC LATTICE SEBAGAI BANTALAN KURSI KERETA UNTUK MITIGASI CEDERA KEPALA

• Main Author: Lutfianto, Raihan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67498
• Institution: Institut Teknologi Bandung

The human need to move and move things from one place to another makes transportation modes such as trains have a vital role. Based on data published by the FRA, the United States had an average number of train-related accidents of 3,205 during 2019-2022. Therefore, the development of passenger safety technology in transportation modes is an absolute must. When a collision occurs, the head is the organ with the most significant risk of causing death, so its protection needs to be made a top priority. The criterion used to evaluate human head injury is the head injury criterion (HIC). The HIC value required by the APTA PR-CS-S-016-99 regulation is HIC15 < 700. To minimize the HIC value, padding of railway seat uses foam material because it has cushioning property. This study evaluated the feasibility of using 3D auxetic lattice as a railway seat padding for mitigating passenger head injuries through a numerical simulation of the 8G sled test. Then, the effect of the parameters of the 3D auxetic unit cell type, the number of 3D auxetic unit cells in the direction of the padding thickness, and the material used on the HIC15 value were evaluated through a parametric study. The simulation results show that the 3D re-entrant type A auxetic latticebased padding produces a lower HIC15 value than the 3D re-entrant type B auxetic lattice. Then, as the number of 3D auxetic unit cells in the padding thickness direction increases, the stiffness and the strength of the padding structure also increase. Resin polymer (RP) materials generally give lower HIC15 values than ethylene-vinyl acetate (EVA) materials. Then, it can be concluded that all numerical model configurations except for 3D re-entrant type B with EVA material with a total of 2 3D auxetic unit cells in the direction of the padding thickness, are considered feasible to be applied as padding to mitigate passenger head injuries because they meet the regulation requirements and perform better than foam block-based padding.