Abstract: The constitutive parameters of the dummy's lower limb material subjected to high-speed vertical impact are checked and optimized to improve the simulation accuracy of dummy under the impact of explosive load. In view of the structural response characteristics of vehicle body subjected to explosion shock wave load, the impact velocity of simulated explosion load impacting the test bench is determined. The impact test of dummy’slower limbs is carried out by setting different impact speeds to obtain the impact force-time curves of the lower limbs. The important material parameters of lower limbs are experimentally designed and the peak value of simulated lower limb tibial force is obtained to optimize the lower limb material parameters with the goal of minimizing the error between the simulated data and the experimental data. Through bench test and finite element numerical simulation verification, the material parameters are optimized, and the best matching of the material constitutive model parameters are obtained for the components of the lower limbs. The results show that the simulated results after optimizing the material parameters of the dummy's lower limb model are in good agreement with the test results, which can provide technical support for the revision of the dummy lower limb material model under high-speed vertical impact.

Key words: lowerlimbofdummy, explosiveloadimpact, materialparameter, reverseengineering, simulatedimpactbench