Service Quality Loss of Passenger Car Drive Shafts Based on Rigidity Degradation Law

As passenger car drive shafts enter the service phase, considering the impact of material properties, complex working conditions, and driver habits, the trend of change in the key quality characteristic values of the passenger car drive shafts should be nonlinear. Collect data based on the standard method for the wear test of the drive shaft, and fits the wear pattern curve based on the results of the bench wear test of the drive shaft. Furthermore, by analyzing the previous research on the stiffness degradation law of the drive shaft tube, the average service quality loss function of the drive shaft is revised. This provides a theoretical support for the life prediction and reliability analysis of passenger car drive shafts during the service phase.