Quasi-static analysis as an approximate method has been widely used for structural durability simulations. But this method misleads in terms of crack location and fatigue life estimation. The main factors which cause incorrect fatigue life estimations...
Quasi-static analysis as an approximate method has been widely used for structural durability simulations. But this method misleads in terms of crack location and fatigue life estimation. The main factors which cause incorrect fatigue life estimations are not satisfying dynamic equivalent conditions due to the inertia effect. This paper presents the modal superposition method that can enhance the accuracy in estimating the fatigue life and the failure mode for a rear torsion beam axle. This method makes it possible to provide accurate dynamic stress history for fatigue analysis and also the solution for the deficiency of traditional quasic-static inertia relief method.