Abstract
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
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