Comparative Study on Numerical Simulation of Thorax Blunt Impact Based on LS-DYNA Software Technology

Abstract

In order to better predict the risk of blunt impact on human thorax, the LS-DYNA software was used to reproduce the launch conditions of the postmortem human specimens(PMHS) experiment of the Wayne State University research group, numerical simulations of thorax blunt impact were carried out in combination with the human body model AM50 and Hybird III 50th Dummy model. The projectiles of impact test were respectively 37mm in diameter, 100mm in length, 140g in mass, with an impact velocity of 20m/s and 40m/s, and 37mm in diameter, 28.5mm in length, 30g in weight, with an impact velocity of 60m/s. The numerical response of thoracic compression was obtained by simulation experiment, which was verified by comparison with the experimental data of PMHS. The displacement curves of the thoracic compression of the two models were both in the response corridors of PMHS by the simulation experiment, and the differences between two displacement curves were analyzed. The viscous standard of Dummy under three launch conditions was calculated to be within the boundary of VCmax in PMHS experiment, which provided a certain theoretical reference for Dummy as a subsequent experimental research object.