Research And Optimization Of Crashworthiness Of B-pillar In A Vehicle Side Impact

With the increasing of the number of car ownership in China, traffic accidents are increasing. In these accidents, the number of casualties caused by car collision is the most, while the side impact accounts for a large proportion. For cars, with weak side strength and small energy absorbing space, and if a collision occurs, the crew will be in great danger. The B-pillar is the main force part in the side impact, and it is subjected to the impact and energy. The amount of invasion and the invasion rate have a direct impact on the degree of injury of occupants, and the reasonable design of B-pillar can reduce the risk of occupants’ injury. Therefore, it is important to improve the safety and decrease the casualty of the car by analyzing and improving the B-pillar of the car.In this thesis, according to "motor vehicle occupant protection in side impact" standard, research on the simulation of moving deformable barrier car crash. Based on the finite element theory, with the main application of the test and finite element analysis method to start the simulation analysis of a vehicle. Using Hypermesh to establish the finite element model of the test vehicle and the impact vehicle, define material properties, set contact and control card output. Submit the finite model to LS-DNYA software solver for calculation and processing. Taking processing and analysis the date in Hyperview. Researching of the B-pillar of deformation pattern, the intrusion measurement and the intrusion velocity.Describing the deformation principle of the B-pillar. Putting forward design of B-pillar filled with foam aluminum. Establishing the simple finite element model of aluminum foam, and taking simulation of compressive mechanical properties of foamed aluminum. The stress strain curves obtained from the experiments are compared with the experimental results. Proving the finite element model is available. Introduction the method of B-pillar filled with foam aluminum. The reinforcing plate of the B-pillar is replaced by foam aluminum. Establishing the finite element model of the foam aluminum component, then completing the calculation. Selecting the key points in the B-pillar. Compared before and after the improvement of the intrusion measurement and the intrusion velocity.It is concluded that the B-pillar filled with foam aluminum decreases the intrusion measurement and the intrusion velocity in a certain degree. In this paper, the approach for study and conclusions can provide reference about improving the side impact security and the simulation of aluminum foam materials.