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Factors affecting front part deformation mode of vehicle front rail

ZENG Ting;WU Shenrong;ZHANG Linbo;TU Jingang;Automobile Engineering Technology Research Institute,CHERY Automobile Co.,Ltd.;  
As to the 40% front offset impact for a vehicle,under the requirement that the design of the rail is not changed,the front part of the front rail is expected to change the deformation mode from bending to collapse. Benchmark study and CAE simulation are performed. Besides the rail design,the strength of front bumper beam,the strength of the connection plates between the crash box and the rail,and the method connecting the rail to the connection plates are identified as the main factors,that affect the deformation mode of the front part of front rail. The further simulation analysis shows that a stable progressive collapse deformation of front rail can be implemented by the proper reinforcement of these parts,which can improve the energy absorption of the front end structure.
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