Sem Resumo

Crashworthiness is a crucial and complex design consideration in the automotive industry. It involves multiple disciplines and intricate energy absorption and dissipation phenomena. Numerical analysis using the finite element method has become a widely adopted approach for studying vehicle safety. This method offers cost and time efficiency, as it typically requires only one physical test for result validation. One specific aspect that needs investigation is the role of friction in impact events and its influence on structural stability. This study aims to evaluate the impact of friction in a crash test through numerical analysis using the finite element method. Additionally, it will explore existing devices for measuring friction under impact conditions and propose a new testing rig based on available literature and functional requirements for friction tests. A data acquisition system will be designed, and data obtained through the proposed methodology will be presented. To capture a broader range of tribological phenomena that affect the friction coefficient, a new constitutive equation will be proposed based on a review of relevant literature. Finally, a comparative analysis will be conducted, comparing the friction models proposed in this work with commonly used approaches in the industry. This analysis will emphasize the significance of incorporating slip velocity and pressure dependence when modeling the friction coefficient.