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Effect of the Thermal Mean Stress Value on the Vibration Fatigue Assessment of the Exhaust System of a Motorcycle Engine
Abstract:
The exhaust manifold of a high-performance motorcycle engine is subjected to
combined thermal and vibrational loadings. In this research, the whole fatigue
assessment of an exhaust manifold is addressed. First, a classic low-cycle
fatigue analysis is performed. Then, a specific methodology for determining the
fatigue cycle of components subjected to thermal and vibration loadings is
developed and presented in a way that possible damages can be evaluated. The
results are post-processed and the damage caused by fatigue cycles is computed
referring to the Wöhler curve of the material using the Dirlik approach.