Fina Andika Frida Astuti, Moch. Agus Choiron, Anindito Purnowidodo, Yudy Surya Irawan
Many studies on crash box design focus on improving energy absorption performance in case of collision. Studies on crash box design are inspired by nature, one of which is the honeycomb design structure. The development of 3D printer technology greatly supports the production of complex designs. Polylactic acid (PLA) material with a carbon base has an opportunity as an alternative material for hybrid crash boxes. This study aims to determine the energy absorption and deformation pattern of the honeycomb hybrid crash box design. The crash box outer wall has a tube cross-section using aluminum and honeycomb filled with PLA carbon filament material. The crash box models are varied as a Circular Tube (CT), Honeycomb Structure (HS), and Honeycomb Hybrid Crash Box (HHC). The quasi-static test is used with a speed of 5 mm/min. Based on the results, it can be seen that the deformation pattern of the honeycomb hybrid crash box on the circular aluminum tube is concertina mode. The honeycomb-filled structure produces mixed mode and support by entering folding on a circular aluminum tube. Energy absorption of the HHC design increased by 17.95% compared with the sum of absorption energy of CT and HS. The energy absorption of the Honeycomb Hybrid Crash Box (HHC) increases because there is no fracture of the Honeycomb Structure (HS). This capability is due to the interaction effect between CT and HS. This model proves that using honeycomb filled increases the energy absorption of the hybrid crash box. © 2024 Author(s).
Doctoral Student of Mechanical Engineering Department, University of Brawijaya, Malang, Indonesia; Mechanical Engineering, State Polytechnic of Malang, Malang, Indonesia; Mechanical Engineering Department, University of Brawijaya, Malang, Indonesia