Flow induced vibration inevitably leads to fretting damage behavior on the surface of steam generator tubes. Impact-sliding fretting wear indicates that alloy tube surface experiences a dynamic impact and a sliding shear behavior simultaneously. Finite element analysis was conducted to investigate the dynamic mechanical response of the Inconel 690 alloy tube, which is influenced by different impact-sliding fretting parameters under frictionless condition. Results showed that the effects of sliding frequency and amplitude on the contact stress, elastic-plastic strain and energy dissipation of the fretting interface were not directly proportional. Increasing the impact amplitude would enhance this dynamic behavior effect.

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