Research on modeling and simulation of car-pedestrian collision using ansys LS-DYNA software

Collisions between cars and pedestrians are one of the leading causes of death and injury in urban traffic. This study focused on analyzing the mechanism of collision between the human head and the bonnet of a car in order to identify the factors that affect the degree of injury. The research model is built on the simulation of a direct collision between the human head model and the bonnet of a car, with the collision position and contact angle following Euro NCAP experimental standards and simulated with different impact velocities. Ansys LS-DYNA software is used to simulate the collision process, in which the HIC (Head Injury Criterion) is applied to assess the degree of head injury risk based on linear acceleration at the center of mass of the head in impact experiments. Using the AIS (Abbreviated Injury Scale) system is a system that classifies the severity of injuries on a scale from 0 to 6, helping to quantify and describe the severity of injuries. The simulation results show that the HIC index increases from 168.74 at 35 km/h to 1782.56 at 80 km/h, while the probability of fatal injury (AIS-6) increases from 0 % to more than 10 %, clearly reflecting the rapid increase in danger as the speed increases. Identifying and analyzing these characteristics can help to come up with bonnet design solutions that can minimize the impact of collisions, improve car safety inspection standards, help traffic managers regulate appropriate driving speeds in urban areas, etc to improve pedestrian safety in urban environments