Fatigue life prediction is an important part of the reliability and durability analysis of automobile components. Based on Wang\nand Brownâ??s framework, multiaxial random fatigue damage was adopted to predict the fatigue life of half-shaft. The stress analysis\nof half-shaft was resolved analytically to determine the local stress tensor in the potential area of fracture. The maximum shear\nstrain fatigue damage parameter and the normal stress fatigue damage parameter were evaluated to predict the fatigue life of halfshaft.\nThe results show that the prediction method is reliable and meets the service life and safety requirements.
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