Abstract:

In view of the long period and high cost of wheel biaxial fatigue test， a novel wheel biaxial fatigue accelerated test method is proposed. Based on the strain measurement results on the key positions of wheel rim under biaxial load condition， with considerations of the apparent rotation cycle characteristics of wheel rim stress， the linear relationship between the cyclic changing stress magnitude and external load intensity and the effects of biaxial load proportion on the direction of wheel rim principal stress， the biaxial loads with similar proportion are merged and reduced based on the principle of damage equivalence. The feasibility and rationality of the wheel biaxial fatigue accelerated test method proposed are verified by tests. The use of the method can greatly reduce the test period and cost.

Key words: wheel rim, biaxial fatigue accelerated test