TIAN Yongjun, ZHANG Yajun, ZENG Biqiang

 

(China Automotive Technology & Research Center, Tianjin 300162, China)

 

 

Abstract: Aiming at losingpoints of dummy tibia in frontal sled test, the dummy tibia damage mechanism in frontal crash and dummy tibia injury in actual collision was analyzed based on several sled tests. Finite element model was established based on the experimental statistics and was verified. The reasons of losingpoints of dummy tibia were analyzed based on the test data and the simulation results. The structure of the footrests was optimized to improve the score of tibia. The feasibility of the scheme was verified by sled test finally. The results indicate that the FE model based on the sled test data can predict the dummy′s movement and injury. The foot cushion structure and material strength are optimized to decrease the tibia injury by improving energyabsorbing of the cushion. The structure optimization can offer reference to the starimproving of the vehicle impact.

 

Key words: frontal crash; tibia injury; sled test; simulation