VALIDATING NUMERICAL SIMULATION RESULTS OF COMBINED EXPANSION TUBE-AXIAL SPLITTING AT FIELD SCALE

• Main Author: Jacky
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/46587
• Institution: Institut Teknologi Bandung

The impact energy absorbers module is one of the most important components in the application of crashworthiness technology to improve the safety of transportation facilities through plastic deformation of the module structure. The application of impact energy absorbers limit impact force to the main structure, so the effects to the passengers can be minimized. It has now been developed a new impact energy absorbers module which is called expansion tube-axial splitting. It is a combination of previous design of expanding and splitting types that can increase the energy absorption and derformation stability under axial loading. Experimental and numerical investigations of expansion tube-axial splitting at field scale has been studied. The numerical simulation is done through varying several parameters include tube thickness, tube inner diameter, and dies outer diameter. Experiment has been done by using Impact Delivery System to hit a specimen that is attached to wall system. The results are captured using loadcell and laser sensor to obtain force-displacement curve. Friction coeffiecient from the experiment is validated using simulation. Based on the simulation, the highest specific energy obtained is 58.5 kJ/kg. The simulation is then compared with the experiment by peak force, mean force and absolute energy. The relative error for peak force, mean force and absolute energy are respectively 1.47%, 6,09%, and 27.27%.