MODELING OF AL-COMPOSITE HYBRID CRASH BOX SUBJECT TO AXIAL IMPACT

• Main Author: Sufian Adi, Aulia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68919
• Institution: Institut Teknologi Bandung

The economic, social, cultural, and technological development will keep progressing as time progress. These developments will be accompanied by the rise in mobility of humans. The need for mobility will be followed by the increase of transport vehicles, especially land transport vehicles. The increase of transport vehicles should be followed by the increase of transportation safety. One of the ways to increase the transportation safety is by developing better crashworthy structures in transport vehicles to better protect the occupants. This research aims to model aluminum crash box, Al-GFRP and Al-CFRP hybrid crash box under axial impact loading. There will be parametric studies which consist of mass scaling parametric study to understand the effect of mass scaling to the simulation results, corner thickness of the crash box parametric study to model splaying deformation, material models parametric study to understand the effect of different material model to the simulation results, and element formulations parametric study to understand the effect of element formulation to the simulation results. The result of the mass scaling parametric study shows that the use of mass scaling can speed up the simulation time without significantly affecting the simulation results. The result of corner thickness of the crash box parametric study shows that one of the thickness variations is able to replicate the splaying deformation but it still has high error on the crashworthiness parameters. The result of the material models parametric study shows that Enhanced Composite Damage model gives the best deformation and crashworthiness parameters result. The result of the element formulations parametric study shows that Belytschko-Tsay element is the most computationally efficient as it takes the least amount of time to finish the simulation and gives fairly low error, however this element has a severe hourglassing problem which is undesireable. Fully Integrated Shell element is the most accurate element formulation and it has little to none hourglassing problem