Investigation of the Impact-Sliding Fretting Behavior of 690 Alloy Tube Using the Finite Element Method

Abstract

Flow-induced vibration inevitably leads to fretting damage behavior on the surface of steam generator tubes. Impact-sliding fretting wear indicates that the 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 conditions. 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.