An energy-based model for impact-sliding fretting wear between tubes and anti-vibration bars in steam generators

The interaction between tubes and anti-vibration bars (AVBs) can cause fretting wear of the tubes. The impact-sliding wear caused by random excitation could not be predicted accurately by current models, therefore an energy-based wear model was proposed in this paper to obtain a better prediction. Statistical analysis was established to obtain parameters such as the impact angle and the energy loss. The results show that impact angle larger than 45 degrees can induce more pronounced energy loss of impacts. The advantage of the energy-based model was proved through the comparison with Archard model. The effect of different wear conditions was analyzed through the microscope and the mechanism of the energy-based expression was elaborated.