Résumé:
The study carried out focuses mainly on numerical analysis by finite elements of the free
deployment of a standard airbag during a frontal collision. In this context, digital finite element
models have been developed to simulate the deployment of a driver airbag subjected to multiaxial
stresses that can cause large deformations. Then, the crash of the air bags by a high-speed impact
was also analyzed. To do this, preliminary tensile tests were carried out in order to determine the
mechanical characteristics in uni-axial traction of the different materials used in this study. The
simulations proposed to simulate a frontal impact were carried out using the Ls Dyna calculation
code. The model developed made it possible to analyze and compare the deployment of airbags
from three major manufacturers. The second part includes digital finite element simulations of the
driver's behavior during the pre-crash phases. The analysis takes into account the evolution of the
position of the belted or not belted manikin after a collision in order to analyze the effectiveness of
the security systems put in a tourist vehicle to protect the passengers. All the results of the
numerical simulations have been validated by experimental comparison.
