Modeling the Damping Effect of Welded Rectangular Profiles under Damped Loads for Automotive Utilization on the Durability

The welded structures are often used for automotive utilization. Indeed, when they are subjected to repeated loadings; the structures can be failed at the time where the load is unbearable because of different parameters that can affect the fatigue strength. The detail of geometry, the surface condition, the quality of welding process and the concentration stress are the most important factors that can led up to the fatigue failure. In this paper, a three dimensional of finite element simulation has been conducted on a model based on damped welded rectangular profiles for automotive utilization. Moreover, the resolution obtained by the static and fatigue analyses conduced to evaluate the equivalent alternating stress and the fatigue life behavior of our structure. Then, we have indicated the effect of the loading variations on the durability of our structure as a linear curve called the fatigue sensitivity curve. Finally, we have plotted the values of the stiffness and the length of spring which is attached to our structure as a function of the durability in order to show the damping effect on the fatigue strength. Therefore, we have concluded that the spring stiffness and the length of spring increase as the durability increases.