Analysis of vehicle´s frontal crash based on structures´ section forces

In this paper, a new method of structures´ section forces is used to analysis the vehicle´s front crash. A complete finite element model of a passenger car is presented. According to the basic principle of the dynamic non-linear finite element method, the basic crash describe equation and FE discretized equation are established. The frontal crash of the integrated car system is successfully simulated in LS-DYNA and the results that including the structures´ section forces and energy absorption time courses, the effect of the main energy-absorbing parts, the transmitting route of the energy and the forces change are attained. Simulation results show, the structures´ section forces can accurately forecast not only crashworthiness of vehicles but also the way transmission of forces in crash process. This method provides an important tool to improve vehicle´s structures´ performances