Study on Bus Rollover Crashworthiness Based on Tube Filling Method

Study on Bus Rollover Crashworthiness Based on Tube Filling Method – Tam Nguyen Thanh 

According to the European regulation ECE R66, the finite element model of a production bus was developed and LS – DYNA software was used to simulate the dynamic response in the rollover process of the bus. In accordance with existing problems of the bus body structure, some improving methods based on tube filling were proposed. Computational simulation and experimental validation were conducted. Simulation and experimental results show that using paraffin, colophony or the composite of epoxy resin, wood flour and hardening agent to fill the rectangular steel tubes at suitable place can increase the stiffness of the bus body structure. Considering the performance of the structure at high temperature, the composite of epoxy resin, wood flour and hardening agent is better than others. Simulation results also show that the improved bus body structure does not penetrate occupant living space in rollover crash, and the regular requirements can be met.